|
| |
|
|
A145959
|
|
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a zee 1,1 1,2 2,2 2,3 in any orientation.
|
|
0
| |
|
|
1, 1, 1, 5, 17, 75, 405, 2821, 26895, 365651, 6440881, 149278281, 4554728635, 183204987539, 9796495036771, 702723336742467
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
