T(n,k)=S(2n+1,n-1,k-1), 0<=k<=n, n >= 0, array S as in A050157.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =4a(5) =5a(6) =9a(7) =14a(8) =20a(9) =21a(10) =28a(11) =48a(12) =75a(13) =83a(14) =84a(15) =90a(16) =165a(17) =275a(18) =319a(19) =329a(20) =330a(21) =297a(22) =572a(23) =1001a(24) =1209a(25) =1274a(26) =1286a(27) =1287a(28) =1001a(29) =2002