Number of n X 3 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

A224257

Number of n X 3 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.

Terms

    a(0) =22a(1) =158a(2) =648a(3) =2017a(4) =5246a(5) =11990a(6) =24842a(7) =47643a(8) =85838a(9) =146878a(10) =240668a(11) =380061a(12) =581398a(13) =865094a(14) =1256270a(15) =1785431a(16) =2489190a(17) =3411038a(18) =4602160a(19) =6122297a(20) =8040654a(21) =10436854a(22) =13401938a(23) =17039411a(24) =21466334a(25) =26814462a(26) =33231428a(27) =40881973a(28) =49949222a(29) =60636006

External references