Number of (n+1)X(3+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235439
Number of (n+1)X(3+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =2500a(1) =65497a(2) =1762344a(3) =37115629a(4) =785712765a(5) =13504013024a(6) =235332193767
External references
- oeis: A235439