Number of n X 4 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

A224169

Number of n X 4 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =130a(1) =3526a(2) =38561a(3) =272130a(4) =1460836a(5) =6425876a(6) =24197608a(7) =80350989a(8) =240416852a(9) =658890738a(10) =1675303647a(11) =3992383968a(12) =8991162356a(13) =19265941324a(14) =39500748718a(15) =77861024489a(16) =148143119762a(17) =273013479180a(18) =488783426991a(19) =852309147046

External references