Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1010-1111-0101 pattern in any orientation.
A147430
Number of n X n binary arrays symmetric under horizontal and vertical reflection 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) =1a(8) =9a(9) =9a(10) =25a(11) =25a(12) =89a(13) =89a(14) =469a(15) =469a(16) =5217a(17) =5217a(18) =82459a(19) =82459a(20) =1354121a(21) =1354121a(22) =28702995a(23) =28702995a(24) =915889909a(25) =915889909
External references
- oeis: A147430