4816168domain: NAppears in sequencesNumber of nX3 0..3 arrays with rows and antidiagonals unimodal.at n=3A223796T(n,k)=Number of nXk 0..3 arrays with rows and antidiagonals unimodal.at n=18A223801Number of 4Xn 0..3 arrays with rows and antidiagonals unimodal.at n=2A223803