Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1010-1111-0101 pattern in any orientation.
A147431
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1010-1111-0101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =9a(7) =19a(8) =43a(9) =151a(10) =665a(11) =3477a(12) =19383a(13) =122069a(14) =922803a(15) =8541115a(16) =92856889a(17) =1171563865a(18) =17291558591a(19) =299747161375
External references
- oeis: A147431