Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01110-11111 pattern in any orientation.
A147362
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01110-11111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =10a(7) =1a(8) =26a(9) =1a(10) =216a(11) =25a(12) =1652a(13) =141a(14) =19963a(15) =756a(16) =394431a(17) =10461a(18) =8267041a(19) =137862a(20) =246247606a(21) =2668563a(22) =11800979307a(23) =89609916
External references
- oeis: A147362