Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
A147484
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =3a(6) =8a(7) =23a(8) =63a(9) =191a(10) =685a(11) =3493a(12) =20460a(13) =144341a(14) =1163965a(15) =10657560a(16) =110643922a(17) =1393408349a(18) =20934516013a(19) =373325933993
External references
- oeis: A147484