Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 101-111-100 pattern in any orientation.
A146192
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 101-111-100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =5a(8) =13a(9) =25a(10) =47a(11) =133a(12) =423a(13) =1611a(14) =6775a(15) =32933a(16) =168271a(17) =931101a(18) =5598003a(19) =40830563a(20) =323824599a(21) =3032262553a(22) =30578017195a(23) =362047227023
External references
- oeis: A146192