Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with row sums equal.
A268365
Number of n X 4 arrays of permutations of 4 copies of 0..n-1 with row sums equal.
Terms
- a(0) =1a(1) =36a(2) =2700a(3) =643680a(4) =190188000a(5) =128247235200
External references
- oeis: A268365