Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.
A146388
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =9a(5) =20a(6) =73a(7) =328a(8) =1655a(9) =10746a(10) =103583a(11) =974458a(12) =13360226a(13) =192146495a(14) =4002035013a(15) =89158887545
External references
- oeis: A146388