Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-1111 pattern in any orientation.
A146865
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =25a(9) =25a(10) =193a(11) =193a(12) =1061a(13) =1061a(14) =19265a(15) =19265a(16) =384413a(17) =384413a(18) =13738057a(19) =13738057a(20) =820631045a(21) =820631045
External references
- oeis: A146865