|
| |
|
|
A146157
|
|
Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only either as two by three or three by two blocks.
|
|
0
| |
|
|
1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 6, 7, 16, 23, 50, 65, 176, 221, 727, 1056, 3742, 5997, 23258, 37914, 168488, 284282, 1460179, 2612520, 15176540, 28767703
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
