Number of 3Xn 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

A224282

Number of 3Xn 0..3 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.

Terms

    a(0) =64a(1) =1600a(2) =13683a(3) =84132a(4) =442089a(5) =2059793a(6) =8626382a(7) =32788075a(8) =114177368a(9) =367630559a(10) =1103854119a(11) =3114501259a(12) =8312578140a(13) =21108455323a(14) =51251494995a(15) =119493052710a(16) =268514504126a(17) =583406544627

External references