Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1100-0111 pattern in any orientation.
A146801
Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1100-0111 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) =169a(13) =169a(14) =2727a(15) =2727a(16) =71937a(17) =71937a(18) =1640171a(19) =1640171a(20) =45826977a(21) =45826977
External references
- oeis: A146801