Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.
A146443
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =17a(8) =41a(9) =75a(10) =189a(11) =781a(12) =2423a(13) =8297a(14) =41313a(15) =246219a(16) =1447691a(17) =8722011a(18) =58593249a(19) =472152107a(20) =3875447631
External references
- oeis: A146443