Catalan transform of Catalan numbers C(n+1).

Terms

a(0) =1a(1) =2a(2) =7a(3) =28a(4) =119a(5) =524a(6) =2363a(7) =10844a(8) =50446a(9) =237280a(10) =1126437a(11) =5389916a(12) =25967972a(13) =125868952a(14) =613385075a(15) =3003586196a(16) =14771851093a(17) =72936101780a(18) =361419276386