2805425280domain: NAppears in sequencesNumber of n X n 0..5 arrays with corresponding row and column sums equal.at n=3A229869T(n,k)=Number of n X n 0..k arrays with corresponding row and column sums equal.at n=31A229870Number of 4X4 0..n arrays with corresponding row and column sums equal.at n=4A229871