Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation.
A146383
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =6a(6) =1a(7) =20a(8) =13a(9) =138a(10) =69a(11) =1792a(12) =528a(13) =26977a(14) =7033a(15) =655185a(16) =141904a(17) =24548006a(18) =4322355a(19) =1409242126a(20) =197401178a(21) =123270232283a(22) =13868215311
External references
- oeis: A146383