Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1101-0111 pattern in any orientation.
A147169
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1101-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =21a(6) =55a(7) =201a(8) =1193a(9) =6291a(10) =45811a(11) =376085a(12) =4555905
External references
- oeis: A147169