Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
A147034
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =25a(7) =85a(8) =499a(9) =2253a(10) =9751a(11) =103141a(12) =1030207a(13) =12930523a(14) =188986765a(15) =3964919203a(16) =79856104275
External references
- oeis: A147034