112436domain: NAppears in sequencesNumber of n X 3 0..3 arrays with rows nondecreasing and antidiagonals unimodal.at n=3A224019T(n,k)=Number of nXk 0..3 arrays with rows nondecreasing and antidiagonals unimodal.at n=18A224024Number of 4Xn 0..3 arrays with rows nondecreasing and antidiagonals unimodal.at n=2A224026