Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.
A147177
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0010-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =5a(6) =25a(7) =93a(8) =439a(9) =1973a(10) =9767a(11) =71707a(12) =630927a(13) =7316817a(14) =94092203a(15) =1666775933
External references
- oeis: A147177