Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1010-1111 pattern in any orientation.
A146814
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1010-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =17a(6) =51a(7) =255a(8) =1303a(9) =6487a(10) =45597a(11) =373491a(12) =4375333a(13) =54687233a(14) =1001558187a(15) =19226580191
External references
- oeis: A146814