Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-0110-0111 pattern in any orientation.
A147503
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-0110-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =7a(8) =19a(9) =33a(10) =55a(11) =139a(12) =371a(13) =947a(14) =2907a(15) =11335
External references
- oeis: A147503