Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.
A147268
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =9a(6) =29a(7) =103a(8) =511a(9) =2699a(10) =17395a(11) =132609a(12) =1255857a(13) =18252625a(14) =280167863a(15) =5590707453
External references
- oeis: A147268