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%I #15 Dec 27 2023 12:25:51
%S 1,9,117,1881,35505,763209,18309861,483213033,13876068609,
%T 429885495945,14269174133301,504579048629049,18917482749919857,
%U 748904109963227721,31194958415494252005,1363010131166317306569,62300347592864208824961
%N Expansion of e.g.f. exp(3*(1/(1-x)^3 - 1)).
%H Seiichi Manyama, <a href="/A294190/b294190.txt">Table of n, a(n) for n = 0..410</a>
%F E.g.f.: exp(3*(1/(1-x)^3 - 1)).
%t With[{nn=20},CoefficientList[Series[Exp[3(1/(1-x)^3-1)],{x,0,nn}],x] Range[ 0,nn]!] (* _Harvey P. Dale_, Mar 03 2018 *)
%o (PARI) N=66; x='x+O('x^N); Vec(serlaplace(exp(3*(1/(1-x)^3-1))))
%Y Column k=3 of A294188.
%Y Cf. A202826.
%K nonn
%O 0,2
%A _Seiichi Manyama_, Oct 24 2017