Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1000-1111 pattern in any orientation.
A146683
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1000-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =19a(7) =27a(8) =543a(9) =1053a(10) =10299a(11) =25793a(12) =392629a(13) =1097335a(14) =60249623a(15) =207343851a(16) =25905457375a(17) =111844208423
External references
- oeis: A146683