Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.
A147434
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1010-1111-0101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =5a(8) =17a(9) =31a(10) =51a(11) =113a(12) =291a(13) =823a(14) =2647a(15) =8411a(16) =31311a(17) =121645a(18) =537901a(19) =2460285a(20) =12092291a(21) =63560047a(22) =371846157a(23) =2296989649
External references
- oeis: A147434