Number of n X n binary arrays symmetric under 180 degree rotation with all 1's connected only in a 00100-00100-00100-11111 pattern in any orientation.
A147324
Number of n X n binary arrays symmetric under 180 degree rotation with all 1's connected only in a 00100-00100-00100-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =15a(8) =54a(9) =179a(10) =629a(11) =2109a(12) =10035a(13) =48099
External references
- oeis: A147324