Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0100-1111 pattern in any orientation.
A146798
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =49a(7) =253a(8) =1201a(9) =4573a(10) =30217a(11) =286533a(12) =2941009a(13) =37746461a(14) =678979449a(15) =14880214645a(16) =369497873441
External references
- oeis: A146798