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

A071264

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

Terms

    a(0) =1a(1) =4a(2) =16a(3) =63a(4) =244a(5) =934a(6) =3549a(7) =13428a(8) =50694a(9) =191216a(10) =721259a(11) =2722073a(12) =10282610a(13) =38886330a(14) =147243585a(15) =558279000a(16) =2119599270a(17) =8058312360a(18) =30677134380a(19) =116937340494a(20) =446317079712

External references