A071731 - OEIS

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A071731

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

%I #3 Mar 30 2012 16:49:26

%S 1,2,5,15,46,146,477,1595,5434,18798,65858,233206,833340,3001316,

%T 10883485,39703635,145612770,536568150,1985612310,7376106210,

%U 27495861060,102820589820,385609643250,1449998633694,5465731321476

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

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Jun 06 2002