A353344 - OEIS

%I #19 Oct 19 2022 11:11:45

%S 1,0,0,6,36,210,1710,17304,194712,2402184,32536080,481094856,

%T 7703580456,132658888752,2443228469136,47904722262144,995970495769920,

%U 21879712141853760,506301721998264000,12306713585213260800,313441368701926135680,8345931596469584686080

%N Expansion of e.g.f. exp(-log(1 - x)^3).

%H Seiichi Manyama, <a href="/A353344/b353344.txt">Table of n, a(n) for n = 0..442</a>

%F E.g.f.: (1 - x)^(-(log(1 - x))^2).

%F a(0) = 1; a(n) = 6 * Sum_{k=1..n} binomial(n-1,k-1) * |Stirling1(k,3)| * a(n-k).

%F a(n) = Sum_{k=0..floor(n/3)} (3*k)! * |Stirling1(n,3*k)|/k!.

%o (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace(exp(-log(1-x)^3)))

%o (PARI) my(N=30, x='x+O('x^N)); Vec(serlaplace((1-x)^(-log(1-x)^2)))

%o (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=6*sum(j=1, i, binomial(i-1, j-1)*abs(stirling(j, 3, 1))*v[i-j+1])); v;

%o (PARI) a(n) = sum(k=0, n\3, (3*k)!*abs(stirling(n, 3*k, 1))/k!);

%Y Column k=3 of A357882.

%Y Cf. A000142, A353358, A353404.

%Y Cf. A347002, A353118, A353664.

%K nonn

%O 0,4

%A _Seiichi Manyama_, May 06 2022