T(n,k)=Number of nXk 0..3 arrays with rows nondecreasing and antidiagonals unimodal.

Terms

a(0) =4a(1) =10a(2) =16a(3) =20a(4) =100a(5) =64a(6) =35a(7) =400a(8) =1000a(9) =256a(10) =56a(11) =1225a(12) =6796a(13) =10000a(14) =1024a(15) =84a(16) =3136a(17) =32523a(18) =112436a(19) =100000a(20) =4096a(21) =120a(22) =7056a(23) =122523a(24) =772683a(25) =1859020a(26) =1000000a(27) =16384a(28) =165a(29) =14400