Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
A147154
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =33a(7) =125a(8) =685a(9) =3853a(10) =28603a(11) =231163a(12) =2799935a(13) =41066873a(14) =767865147a(15) =16399923305
External references
- oeis: A147154