Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal or antidiagonal neighbors.

A220636

Number of ways to reciprocally link elements of an 6Xn array either to themselves or to exactly two horizontal or antidiagonal neighbors.

Terms

    a(0) =1a(1) =1a(2) =13a(3) =351a(4) =8560a(5) =183961a(6) =3817452a(7) =79063898a(8) =1643423543a(9) =34184820039a(10) =711142299027

External references