Number of nX4 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing.

A201986

Number of nX4 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing.

Terms

    a(0) =18a(1) =14107a(2) =11648559a(3) =7375608084

External references