%I #5 May 30 2016 11:45:21
%S 1,3,9,28,91,301,1015,3480,12099,42562,151228,541960,1956734,7110845,
%T 25989701,95475760,352339875,1305592470,4855786680,18120495720,
%U 67828282410,254606644050,958182559854,3614592283728,13665501157070
%N Expansion of (1+x^4*C)*C^3, where C = (1-(1-4*x)^(1/2))/(2*x) is g.f. for Catalan numbers, A000108.
%t With[{c=(1-Sqrt[1-4x])/(2x)},CoefficientList[Series[(1+x^4*c)c^3,{x,0,30}],x]] (* _Harvey P. Dale_, May 30 2016 *)
%K nonn
%O 0,2
%A _N. J. A. Sloane_, Jun 06 2002
|