Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1001-1111 pattern in any orientation.
A146625
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1001-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =17a(6) =43a(7) =177a(8) =951a(9) =5185a(10) =35811a(11) =267203a(12) =2640609a(13) =29564643a(14) =461890027a(15) =7371309815a(16) =158387025739
External references
- oeis: A146625