Number of ways to reciprocally link elements of an nX5 array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without 3-loops.

A220599

Number of ways to reciprocally link elements of an nX5 array either to themselves or to exactly two horizontal, vertical and antidiagonal neighbors, without 3-loops.

Terms

    a(0) =1a(1) =44a(2) =3469a(3) =167614a(4) =7558495a(5) =352586943a(6) =16505365334a(7) =770615995060

External references