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

A224205

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

Terms

    a(0) =64a(1) =1600a(2) =16060a(3) =108625a(4) =586343a(5) =2734683a(6) =11446096a(7) =43787371a(8) =154644169a(9) =507763502a(10) =1559390798a(11) =4504599056a(12) =12304311893a(13) =31936080080a(14) =79116405604a(15) =187828358540a(16) =428877669532a(17) =944895859570

External references