|
| |
|
|
A146033
|
|
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 3X3 el 1,1 1,2 1,3 2,3 3,3 in any orientation.
|
|
0
| |
|
|
1, 1, 3, 7, 15, 39, 189, 995, 5569, 37913, 366061, 4244909, 58320195, 974389263, 20855855835, 546928072163, 17575257415665, 693118931384501, 34026835620030291, 2054942936198627105, 152983262052724174217
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
