Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.
A147438
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =18a(9) =9a(10) =122a(11) =25a(12) =908a(13) =89a(14) =6686a(15) =611
External references
- oeis: A147438