Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 7 elements linked to themselves.

A271616

Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 7 elements linked to themselves.

Terms

    a(0) =1a(1) =4a(2) =27a(3) =406a(4) =12180a(5) =550173a(6) =18314708a(7) =1182352612a(8) =291282493174

External references