Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-001 pattern in any orientation.
A146239
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 110-111-001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =41a(6) =201a(7) =1157a(8) =6733a(9) =60161a(10) =712733a(11) =11701425a(12) =239309475a(13) =6797981481a(14) =227189935315
External references
- oeis: A146239