Number of n X 4 1..2 arrays containing at least one of each value, and all equal values connected.
A166766
Number of n X 4 1..2 arrays containing at least one of each value, and all equal values connected.
Terms
- a(0) =6a(1) =56a(2) =292a(3) =1254a(4) =4942a(5) =18584a(6) =67756a(7) =241542a(8) =846502a(9) =2927816a(10) =10023380a(11) =34042358a(12) =114900334a(13) =385933816a(14) =1291392908a(15) =4308452150a(16) =14341213590a(17) =47651315192a(18) =158111069492a(19) =524063522870
External references
- oeis: A166766