Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0001 pattern in any orientation.
A146848
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =17a(7) =21a(8) =589a(9) =1209a(10) =14169a(11) =35833a(12) =752335a(13) =2255937a(14) =153849079a(15) =571403355a(16) =75555523219a(17) =350876915239
External references
- oeis: A146848