T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

A278727

T(n,k)=Number of nXk 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order.

Terms

    a(0) =4a(1) =10a(2) =10a(3) =20a(4) =60a(5) =20a(6) =35a(7) =275a(8) =275a(9) =35a(10) =56a(11) =1050a(12) =3232a(13) =1050a(14) =56a(15) =84a(16) =3492a(17) =33466a(18) =33466a(19) =3492a(20) =84a(21) =120a(22) =10401a(23) =306070a(24) =1058494a(25) =306070a(26) =10401a(27) =120a(28) =165a(29) =28288

External references