Incidence matrix

(N → ∞)

2N  * | 1  4  0  0  0 |  4  4  0  0  0 | 4 1 0
 * 8N | 0  1  2  1  1 |  1  2  2  2  1 | 2 1 2
------+---------------+----------------+------
 2  0 | N  *  *  *  * |  4  0  0  0  0 | 4 0 0
 1  1 | * 8N  *  *  * |  1  2  0  0  0 | 2 1 0
 0  2 | *  * 8N  *  * |  0  1  1  1  0 | 1 1 1
 0  2 | *  *  * 4N  * |  1  0  2  0  1 | 2 0 2
 0  2 | *  *  *  * 4N |  0  0  0  2  1 | 0 1 2
------+---------------+----------------+------
 4  4 | 2  4  0  2  0 | 2N  *  *  *  * | 2 0 0
 1  2 | 0  2  1  0  0 |  * 8N  *  *  * | 1 1 0
 0  8 | 0  0  4  4  0 |  *  * 2N  *  * | 1 0 1
 0  4 | 0  0  2  0  2 |  *  *  * 4N  * | 0 1 1
 0  4 | 0  0  0  2  2 |  *  *  *  * 2N | 0 0 2
------+---------------+----------------+------
 8 16 | 4 16  8  8  0 |  4  8  2  0  0 | N * *  tic
 2  8 | 0  8  8  0  4 |  0  8  0  4  0 | * N *  esquidpy
 0 16 | 0  0  8  8  8 |  0  0  2  4  4 | * * N  op