Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-100 pattern in any orientation.
A146187
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =39a(6) =227a(7) =1199a(8) =6097a(9) =63869a(10) =840409a(11) =12862601a(12) =284127507a(13) =7552975051a(14) =252656207179
External references
- oeis: A146187