Number of zero-sum nX6 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.

A201845

Number of zero-sum nX6 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.

Terms

    a(0) =9a(1) =1897a(2) =259811a(3) =47249907a(4) =8964073263

External references