Number of n X n zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.
A201489
Number of n X n zero-sum -2..2 arrays with rows and columns lexicographically nondecreasing.
Terms
- a(0) =1a(1) =29a(2) =9331a(3) =50432052
External references
- oeis: A201489