266515625domain: NAppears in sequencesNumber of n X n 0..4 arrays with corresponding row and column sums equal.at n=3A229868T(n,k)=Number of n X n 0..k arrays with corresponding row and column sums equal.at n=24A229870Number of 4X4 0..n arrays with corresponding row and column sums equal.at n=3A229871