506513domain: NAppears in sequencesNumber of nX4 0..3 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=3A224060T(n,k)=Number of nXk 0..3 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.at n=24A224064