Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-0100-1111 pattern in any orientation.
A146793
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-0100-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =17a(9) =17a(10) =49a(11) =49a(12) =129a(13) =129a(14) =2513a(15) =2513a(16) =72929a(17) =72929a(18) =1541697a(19) =1541697a(20) =32044977a(21) =32044977
External references
- oeis: A146793