Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0101-0111 pattern in any orientation.
A147207
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0101-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =13a(8) =37a(9) =65a(10) =115a(11) =397a(12) =1335a(13) =4065a(14) =16853a(15) =83455a(16) =458373a(17) =2464107a(18) =13365801a(19) =84069939a(20) =594053347
External references
- oeis: A147207