Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation.
A146428
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =17a(5) =37a(6) =137a(7) =887a(8) =6015a(9) =58025a(10) =613977a(11) =8063295a(12) =140732661a(13) =3250417071
External references
- oeis: A146428