Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 101-111-010 pattern in any orientation.
A146223
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 101-111-010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =21a(6) =64a(7) =303a(8) =1134a(9) =7339a(10) =57196a(11) =589857a(12) =6245651a(13) =99774377a(14) =1593180484a(15) =36586038636a(16) =878744243108
External references
- oeis: A146223