Number of nX6 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing.
A202031
Number of nX6 zero-sum -1..1 arrays with rows and columns lexicographically nondecreasing.
Terms
- a(0) =4a(1) =281a(2) =44300a(3) =8249505a(4) =1387552127a(5) =197324899476
External references
- oeis: A202031