Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1111-0001 pattern in any orientation.
A146854
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =21a(6) =55a(7) =223a(8) =1323a(9) =7243a(10) =56001a(11) =498505a(12) =5857355a(13) =89335203a(14) =1598206021a(15) =35814813801
External references
- oeis: A146854