Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two king-move neighbors.

A220594

Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two king-move neighbors.

Terms

    a(0) =1a(1) =3265a(2) =1250507a(3) =702811381a(4) =353961472626

External references