Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0010 pattern in any orientation.
A146404
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =25a(6) =63a(7) =357a(8) =1891a(9) =12499a(10) =113287a(11) =1385821a(12) =19264611a(13) =381162993a(14) =8433132619
External references
- oeis: A146404