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

A071756

Expansion of (1+x^4*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) =3a(2) =9a(3) =28a(4) =91a(5) =304a(6) =1036a(7) =3586a(8) =12571a(9) =44538a(10) =159222a(11) =573648a(12) =2080766a(13) =7592438a(14) =27850010a(15) =102638190a(16) =379859835a(17) =1411205250a(18) =5260849110a(19) =19673751960a(20) =73784984490a(21) =277457327160

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