Number of zero-sum nX7 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.

A201846

Number of zero-sum nX7 -1..1 arrays with every element equal to at least one horizontal or vertical neighbor.

Terms

    a(0) =7a(1) =8741a(2) =2809217a(3) =1459651671a(4) =697824874477

External references