Triangle read by rows, T(n,k) = C(n,k)*C(2*k,k)/(k+1), n >= 0, 0 <= k <= n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =2a(6) =1a(7) =3a(8) =6a(9) =5a(10) =1a(11) =4a(12) =12a(13) =20a(14) =14a(15) =1a(16) =5a(17) =20a(18) =50a(19) =70a(20) =42a(21) =1a(22) =6a(23) =30a(24) =100a(25) =210a(26) =252a(27) =132a(28) =1a(29) =7