Expansion of (1+x^3*C)*C, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

A071726

Expansion of (1+x^3*C)*C, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =47a(6) =146a(7) =471a(8) =1562a(9) =5291a(10) =18226a(11) =63648a(12) =224808a(13) =801686a(14) =2882452a(15) =10437745a(16) =38032110a(17) =139339635a(18) =512996370a(19) =1896907980a(20) =7041759120a(21) =26233530210a(22) =98046684060a(23) =367525880670

External references