Incidence matrix according to Dynkin symbol

:xxoooooo:3:ooxxoooo:3:ooooxxoo:3:ooooooxx:3*a&##x   heights alternatingly = sqrt(2/3) = 0.816497 resp. = 1

o....... 3 o....... 3 o....... 3 o....... 3*a    & | N * | 12 1  0  4 | 12 12 12  0  0  6 12 | 4 6 4 12 12 0 0 0 12  4 12 | 4 6 4 6 4 1 4
.o...... 3 .o...... 3 .o...... 3 .o...... 3*a    & | * N |  0 1 12  4 |  0  0 12 12 12 12  6 | 0 0 0 12 12 4 6 4 12 12  4 | 4 6 4 4 6 4 1
---------------------------------------------------+-----+------------+----------------------+----------------------------+--------------
x.......   ........   ........   ........        & | 2 0 | 6N *  *  * |  2  2  1  0  0  0  1 | 1 2 1  2  2 0 0 0  2  0  2 | 1 2 1 2 1 0 1
oo...... 3 oo...... 3 oo...... 3 oo...... 3*a&#x & | 1 1 |  * N  *  * ♦  0  0 12  0  0  0  0 | 0 0 0 12 12 0 0 0  0  0  0 | 4 6 4 0 0 0 0
.x......   ........   ........   ........        & | 0 2 |  * * 6N  * |  0  0  1  2  2  1  0 | 0 0 0  2  2 1 2 1  2  2  0 | 1 2 1 1 2 1 0
.oo..... 3 .oo..... 3 .oo..... 3 .oo..... 3*a&#x & | 1 1 |  * *  * 4N ♦  0  0  0  0  0  3  3 | 0 0 0  0  0 0 0 0  6  3  3 | 0 0 0 3 3 1 1
---------------------------------------------------+-----+------------+----------------------+----------------------------+--------------
x....... 3 o.......   ........   ........        & | 3 0 |  3 0  0  0 | 4N  *  *  *  *  *  * | 1 1 0  1  0 0 0 0  0  0  1 | 1 1 0 1 0 0 1
x.......   ........   ........   o....... 3*a    & | 3 0 |  3 0  0  0 |  * 4N  *  *  *  *  * | 0 1 1  0  1 0 0 0  1  0  0 | 0 1 1 1 1 0 0
xx......   ........   ........   ........    &#x & | 2 2 |  1 2  1  0 |  *  * 6N  *  *  *  * | 0 0 0  2  2 0 0 0  0  0  0 | 1 2 1 0 0 0 0
.x...... 3 .o......   ........   ........        & | 0 3 |  0 0  3  0 |  *  *  * 4N  *  *  * | 0 0 0  1  0 1 1 0  1  0  0 | 1 1 0 1 1 0 0
.x......   ........   ........   .o...... 3*a    & | 0 3 |  0 0  3  0 |  *  *  *  * 4N  *  * | 0 0 0  0  1 0 1 1  0  1  0 | 0 1 1 0 1 1 0
.xo.....   ........   ........   ........    &#x & | 1 2 |  0 0  1  2 |  *  *  *  *  * 6N  * | 0 0 0  0  0 0 0 0  2  2  0 | 0 0 0 1 2 1 0
........   .ox.....   ........   ........    &#x & | 2 1 |  1 0  0  2 |  *  *  *  *  *  * 6N | 0 0 0  0  0 0 0 0  2  0  2 | 0 0 0 2 1 0 1
---------------------------------------------------+-----+------------+----------------------+----------------------------+--------------
x....... 3 o....... 3 o.......   ........        & ♦ 4 0 |  6 0  0  0 |  4  0  0  0  0  0  0 | N * *  *  * * * *  *  *  * | 1 0 0 0 0 0 1
x....... 3 o.......   ........   o....... 3*a    & ♦ 6 0 | 12 0  0  0 |  4  4  0  0  0  0  0 | * N *  *  * * * *  *  *  * | 0 1 0 1 0 0 0
x.......   ........   o....... 3 o....... 3*a    & ♦ 4 0 |  6 0  0  0 |  0  4  0  0  0  0  0 | * * N  *  * * * *  *  *  * | 0 0 1 0 1 0 0
xx...... 3 oo......   ........   ........    &#x & ♦ 3 3 |  3 3  3  0 |  1  0  3  1  0  0  0 | * * * 4N  * * * *  *  *  * | 1 1 0 0 0 0 0
xx......   ........   ........   oo...... 3*a&#x & ♦ 3 3 |  3 3  3  0 |  0  1  3  0  1  0  0 | * * *  * 4N * * *  *  *  * | 0 1 1 0 0 0 0
.x...... 3 .o...... 3 .o......   ........        & ♦ 0 4 |  0 0  6  0 |  0  0  0  4  0  0  0 | * * *  *  * N * *  *  *  * | 1 0 0 1 0 0 0
.x...... 3 .o......   ........   .o...... 3*a    & ♦ 0 6 |  0 0 12  0 |  0  0  0  4  4  0  0 | * * *  *  * * N *  *  *  * | 0 1 0 0 1 0 0
.x......   ........   .o...... 3 .o...... 3*a    & ♦ 0 4 |  0 0  6  0 |  0  0  0  0  4  0  0 | * * *  *  * * * N  *  *  * | 0 0 1 0 0 1 0
.xo..... 3 .ox.....   ........   ........    &#x & ♦ 3 3 |  3 0  3  6 |  0  1  0  1  0  3  3 | * * *  *  * * * * 4N  *  * | 0 0 0 1 1 0 0
.xo.....   ........   ........   .oo..... 3*a&#x & ♦ 1 3 |  0 0  3  3 |  0  0  0  0  1  3  0 | * * *  *  * * * *  * 4N  * | 0 0 0 0 1 1 0
........   .ox..... 3 .oo.....   ........    &#x & ♦ 3 1 |  3 0  0  3 |  1  0  0  0  0  0  3 | * * *  *  * * * *  *  * 4N | 0 0 0 1 0 0 1
---------------------------------------------------+-----+------------+----------------------+----------------------------+--------------
xx...... 3 oo...... 3 oo......   ........    &#x & ♦ 4 4 |  6 4  6  0 |  4  0  6  4  0  0  0 | 1 0 0  4  0 1 0 0  0  0  0 | N * * * * * *
xx...... 3 oo......   ........   oo...... 3*a&#x & ♦ 6 6 | 12 6 12  0 |  4  4 12  4  4  0  0 | 0 1 0  4  4 0 1 0  0  0  0 | * N * * * * *
xx......   ........   oo...... 3 oo...... 3*a&#x & ♦ 4 4 |  6 4  6  0 |  0  4  6  0  4  0  0 | 0 0 1  0  4 0 0 1  0  0  0 | * * N * * * *
.xo..... 3 .ox..... 3 .oo.....   ........    &#x & ♦ 6 4 | 12 0  6 12 |  4  4  0  4  0  6 12 | 0 1 0  0  0 1 0 0  4  0  4 | * * * N * * *
.xo..... 3 .ox.....   ........   .oo..... 3*a&#x & ♦ 4 6 |  6 0 12 12 |  0  4  0  4  4 12  6 | 0 0 1  0  0 0 1 0  4  4  0 | * * * * N * *
.xo.....   ........   .oo..... 3 .oo..... 3*a&#x & ♦ 1 4 |  0 0  6  4 |  0  0  0  0  4  6  0 | 0 0 0  0  0 0 0 1  0  4  0 | * * * * * N *
........   .ox..... 3 .oo..... 3 .oo..... 3*a&#x & ♦ 4 1 |  6 0  0  4 |  4  0  0  0  0  0  6 | 1 0 0  0  0 0 0 0  0  0  4 | * * * * * * N
                                                     a a    b    b       c  d     d  c  e  e   f g h  i  i h g f     j  j   k   k l l m m

or
.o...... 3 .o...... 3 .o...... 3 .o...... 3*a    & | 2N | 1  12  4 | 12 12 12  18 | 24  4  6  4 12 16 |  8 6 10  5  a
---------------------------------------------------+----+----------+--------------+-------------------+-----------
oo...... 3 oo...... 3 oo...... 3 oo...... 3*a&#x & |  2 | N   *  * ♦ 12  0  0   0 | 24  0  0  0  0  0 |  8 6  0  0
.x......   ........   ........   ........        & |  2 | * 12N  * |  1  2  2   1 |  4  1  2  1  2  2 |  2 2  3  1  b
.oo..... 3 .oo..... 3 .oo..... 3 .oo..... 3*a&#x & |  2 | *   * 4N ♦  0  0  0   6 |  0  0  0  0  6  6 |  0 0  6  2
---------------------------------------------------+----+----------+--------------+-------------------+-----------
xx......   ........   ........   ........    &#x & |  4 | 2   2  0 | 6N  *  *   * |  4  0  0  0  0  0 |  2 2  0  0
.x...... 3 .o......   ........   ........        & |  3 | 0   3  0 |  * 8N  *   * |  1  1  1  0  1  0 |  1 1  2  0  d
.x......   ........   ........   .o...... 3*a    & |  3 | 0   3  0 |  *  * 8N   * |  1  0  1  1  0  1 |  1 1  1  1  c
.xo.....   ........   ........   ........    &#x & |  3 | 0   1  2 |  *  *  * 12N |  0  0  0  0  2  2 |  0 0  3  1  e
---------------------------------------------------+----+----------+--------------+-------------------+-----------
xx...... 3 oo......   ........   ........    &#x & ♦  6 | 3   6  0 |  3  1  1   0 | 8N  *  *  *  *  * |  1 1  0  0  i
.x...... 3 .o...... 3 .o......   ........        & ♦  4 | 0   6  0 |  0  4  0   0 |  * 2N  *  *  *  * |  1 0  1  0  h
.x...... 3 .o......   ........   .o...... 3*a    & ♦  6 | 0  12  0 |  0  4  4   0 |  *  * 2N  *  *  * |  0 1  1  0  g
.x......   ........   .o...... 3 .o...... 3*a    & ♦  4 | 0   6  0 |  0  0  4   0 |  *  *  * 2N  *  * |  1 0  0  1  f
.xo..... 3 .ox.....   ........   ........    &#x & ♦  6 | 0   6  6 |  0  2  0   6 |  *  *  *  * 4N  * |  0 0  2  0
.xo.....   ........   ........   .oo..... 3*a&#x & ♦  4 | 0   3  3 |  0  0  1   3 |  *  *  *  *  * 8N |  0 0  1  1  j
---------------------------------------------------+----+----------+--------------+-------------------+-----------
xx...... 3 oo...... 3 oo......   ........    &#x & ♦  8 | 4  12  0 |  6  4  4   0 |  4  1  0  1  0  0 | 2N *  *  *  k
xx...... 3 oo......   ........   oo...... 3*a&#x & ♦ 12 | 6  24  0 | 12  8  8   0 |  8  0  2  0  0  0 |  * N  *  *
.xo..... 3 .ox..... 3 .oo.....   ........    &#x & ♦ 10 | 0  18 12 |  0  8  4  18 |  0  1  1  0  4  4 |  * * 2N  *  l
.xo.....   ........   .oo..... 3 .oo..... 3*a&#x & ♦  5 | 0   6  4 |  0  0  4   6 |  0  0  0  1  0  4 |  * *  * 2N  m