cp's OEIS Frontend

A224095 Numerators of poly-Cauchy numbers c_n^(2).

%I A224095 #36 Feb 26 2023 13:20:48
%S A224095 1,1,-5,11,-1103,1627,-374473,1220651,-92146157,31595747,-20000218625,
%T A224095 176776749931,-5607610511548471,374753409522157,-55207553310144173,
%U A224095 202183428095237231,-1614396705602979083803
%N A224095 Numerators of poly-Cauchy numbers c_n^(2).
%C A224095 The poly-Cauchy numbers c_n^(k) can be expressed in terms of the (unsigned) Stirling numbers of the first kind: c_n^(k) = (-1)^n*sum(abs(stirling1(n,m))*(-1)^m/(m+1)^k, m=0..n).
%H A224095 Vincenzo Librandi, <a href="/A224095/b224095.txt">Table of n, a(n) for n = 0..300</a>
%H A224095 Takao Komatsu, <a href="http://www.kurims.kyoto-u.ac.jp/~kyodo/kokyuroku/contents/pdf/1806-06.pdf">Poly-Cauchy numbers</a>, RIMS Kokyuroku 1806 (2012)
%H A224095 Takao Komatsu, <a href="http://link.springer.com/article/10.1007/s11139-012-9452-0">Poly-Cauchy numbers with a q parameter</a>, Ramanujan J. 31 (2013), 353-371.
%H A224095 Takao Komatsu, <a href="http://doi.org/10.2206/kyushujm.67.143">Poly-Cauchy numbers</a>, Kyushu J. Math. 67 (2013), 143-153.
%H A224095 T. Komatsu, V. Laohakosol, K. Liptai, <a href="http://dx.doi.org/10.1155/2013/179841">A generalization of poly-Cauchy numbers and its properties</a>, Abstract and Applied Analysis, Volume 2013, Article ID 179841, 8 pages.
%H A224095 Takao Komatsu, FZ Zhao, <a href="http://arxiv.org/abs/1603.06725">The log-convexity of the poly-Cauchy numbers</a>, arXiv preprint arXiv:1603.06725, 2016
%t A224095 Table[Numerator[Sum[StirlingS1[n, k]/ (k + 1)^2, {k, 0, n}]], {n, 0, 25}]
%o A224095 (PARI) a(n) = numerator(sum(k=0, n,stirling(n, k, 1)/(k+1)^2)); \\ _Michel Marcus_, Nov 15 2015
%Y A224095 Cf. A006232, A222627, A224094 (denominators).
%K A224095 sign,frac
%O A224095 0,3
%A A224095 _Takao Komatsu_, Mar 31 2013