# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/
Search: id:a224105
Showing 1-1 of 1
%I A224105 #36 Feb 26 2023 18:12:07
%S A224105 1,16,1296,6912,6480000,288000,6223392000,14224896000,1440270720000,
%T A224105 64012032000,562320096307200,511200087552000,255506749760021760000,
%U A224105 1455878916011520000,673863955411046400,17969705477627904000
%N A224105 Denominators of poly-Cauchy numbers of the second kind hat c_n^(4).
%C A224105 The poly-Cauchy numbers of the second kind hat c_n^(k) can be expressed in terms of the (unsigned) Stirling numbers of the first kind: hat c_n^(k) = (-1)^n*sum(abs(stirling1(n,m))/(m+1)^k, m=0..n).
%H A224105 Vincenzo Librandi, Table of n, a(n) for n = 0..300
%H A224105 Takao Komatsu, Poly-Cauchy numbers, RIMS Kokyuroku 1806 (2012)
%H A224105 Takao Komatsu, Poly-Cauchy numbers with a q parameter, Ramanujan J. 31 (2013), 353-371.
%H A224105 Takao Komatsu, Poly-Cauchy numbers, Kyushu J. Math. 67 (2013), 143-153.
%H A224105 T. Komatsu, V. Laohakosol, K. Liptai, A generalization of poly-Cauchy numbers and its properties, Abstract and Applied Analysis, Volume 2013, Article ID 179841, 8 pages.
%H A224105 Takao Komatsu, FZ Zhao, The log-convexity of the poly-Cauchy numbers, arXiv preprint arXiv:1603.06725, 2016
%t A224105 Table[Denominator[Sum[StirlingS1[n, k] (-1)^k/ (k + 1)^4, {k, 0, n}]], {n, 0, 25}]
%o A224105 (PARI) a(n) = denominator(sum(k=0, n,(-1)^k*stirling(n, k, 1)/(k+1)^4)); \\ _Michel Marcus_, Nov 15 2015
%Y A224105 Cf. A002790, A223902, A219247, A224103, A224106 (numerators).
%K A224105 nonn,frac
%O A224105 0,2
%A A224105 _Takao Komatsu_, Mar 31 2013
# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE