Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation.
A146716
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-1000 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) =53a(11) =53a(12) =349a(13) =349a(14) =4017a(15) =4017a(16) =76237a(17) =76237a(18) =2269673a(19) =2269673a(20) =85654393a(21) =85654393
External references
- oeis: A146716