Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation.
A146380
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =13a(6) =27a(7) =135a(8) =527a(9) =2581a(10) =17899a(11) =176183a(12) =1596080a(13) =23232289a(14) =321756402a(15) =6986541337a(16) =150961652645
External references
- oeis: A146380