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

A071753

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

Terms

    a(0) =1a(1) =4a(2) =14a(3) =48a(4) =166a(5) =579a(6) =2037a(7) =7226a(8) =25831a(9) =92988a(10) =336872a(11) =1227400a(12) =4495191a(13) =16540013a(14) =61116635a(15) =226700190a(16) =843851715a(17) =3151174800a(18) =11802018060a(19) =44321634960a(20) =166863174240a(21) =629665197174

External references