Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.
A146022
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =21a(5) =39a(6) =231a(7) =1367a(8) =12771a(9) =121235a(10) =1706171a(11) =26315137a(12) =652740079a(13) =17081149001
External references
- oeis: A146022