Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly one horizontal or antidiagonal neighbor.

A220560

Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly one horizontal or antidiagonal neighbor.

Terms

    a(0) =13a(1) =481a(2) =16310a(3) =561636a(4) =19333688a(5) =665748170a(6) =22926570957a(7) =789539775889

External references