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
- oeis: A201986