Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-110 pattern in any orientation.
A146271
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =17a(6) =56a(7) =271a(8) =962a(9) =4903a(10) =45104a(11) =358857a(12) =4309512a(13) =55284185a(14) =919547239a(15) =17250892544a(16) =432277811298
External references
- oeis: A146271