Incidence matrix according to symbol extension

x3o:s3s4s   (N → ∞)

N |  24 |  36 24 | 32 6  verf: snic
--+-----+--------+-----
2 | 12N |   3  2 |  4 1
--+-----+--------+-----
3 |   3 | 12N  * |  2 0
3 |   3 |   * 8N |  1 1
--+-----+--------+-----
4 |   6 |   3  1 | 8N *  tet
6 |  12 |   0  8 |  * N  oct