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

A071748

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

Terms

    a(0) =1a(1) =3a(2) =9a(3) =28a(4) =91a(5) =302a(6) =1021a(7) =3507a(8) =12209a(9) =42991a(10) =152866a(11) =548148a(12) =1979990a(13) =7198055a(14) =26316577a(15) =96701545a(16) =356941485a(17) =1322891115a(18) =4920919230a(19) =18366138480a(20) =68756266170a(21) =258118218960a(22) =971492416674

External references