Number of ways to reciprocally link elements of an 5Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

A220566

Number of ways to reciprocally link elements of an 5Xn array either to themselves or to exactly one horizontal or antidiagonal neighbor.

Terms

    a(0) =1a(1) =89a(2) =1332a(3) =36640a(4) =810778a(5) =19333688a(6) =449429440a(7) =10536960271a(8) =246344047375

External references