Number of nX2 0..3 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

A224058

Number of nX2 0..3 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing.

Terms

    a(0) =16a(1) =160a(2) =984a(3) =4580a(4) =17723a(5) =59792a(6) =180821a(7) =499357a(8) =1276595a(9) =3053471a(10) =6892199a(11) =14784563a(12) =30317821a(13) =59727346a(14) =113515445a(15) =208880837a(16) =373286086a(17) =649594326a(18) =1103335758a(19) =1832822970a(20) =2983026931a(21) =4764357840a(22) =7477772697a(23) =11547960881

External references