Number of n X 4 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.

A201492

Number of n X 4 zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.

Terms

    a(0) =8a(1) =1454a(2) =301432a(3) =50432052a(4) =6697376240a(5) =732383803600

External references