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%I #5 Mar 30 2012 16:49:26
%S 1,2,5,15,47,152,504,1705,5863,20436,72046,256462,920550,3328192,
%T 12109270,44305245,162911415,601700700,2231255070,8304089970,
%U 31007435970,116130446640,436137803400,1642112017338,6197239974582
%N Expansion of (1+x^3*C^3)*C^2, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.
%Y First differences of A000782.
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Jun 06 2002
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