T(n,k)=S(2n+3,n+3,k+3), 0<=k<=n, n >= 0, array S as in A050157.

Terms

a(0) =1a(1) =4a(2) =5a(3) =14a(4) =20a(5) =21a(6) =48a(7) =75a(8) =83a(9) =84a(10) =165a(11) =275a(12) =319a(13) =329a(14) =330a(15) =572a(16) =1001a(17) =1209a(18) =1274a(19) =1286a(20) =1287a(21) =2002a(22) =3640a(23) =4550a(24) =4900a(25) =4990a(26) =5004a(27) =5005a(28) =7072a(29) =13260