680115
domain: N
Appears in sequences
- Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <=72.at n=4A195890
- T(n,k) = Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <= 2k^2.at n=49A195892
- Number of lower triangles of a 5X5 integer array with all row and column sums zero and all row and column sums of squares <= 2n^2.at n=5A195893