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A224101 Numerators of poly-Cauchy numbers c_n^(5). 2
1, 1, -211, 4241, -57453709, 29825987, -7362684132917, 198504470798947, -415989828245529323, 730328251215062341, -628191544925589374756597, 1131010588175721446183783, -80125844020238574218022657310343 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

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).

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..250

Takao Komatsu, Poly-Cauchy numbers, RIMS Kokyuroku 1806 (2012)

Takao Komatsu, Poly-Cauchy numbers with a q parameter, Ramanujan J. 31 (2013), 353-371.

Takao Komatsu, Poly-Cauchy numbers, Kyushu J. Math. 67 (2013), 143-153.

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.

Takao Komatsu, FZ Zhao, The log-convexity of the poly-Cauchy numbers, arXiv preprint arXiv:1603.06725, 2016

MATHEMATICA

Table[Numerator[Sum[StirlingS1[n, k]/ (k + 1)^5, {k, 0, n}]], {n, 0, 25}]

PROG

(PARI) a(n) = numerator(sum(k=0, n, stirling(n, k, 1)/(k+1)^5)); \\ Michel Marcus, Nov 15 2015

CROSSREFS

Cf. A006232, A223023, A224095, A224097, A224099, A224100 (denominators).

Sequence in context: A071367 A271979 A185719 * A013529 A229519 A289983

Adjacent sequences: A224098 A224099 A224100 * A224102 A224103 A224104

KEYWORD

sign,frac

AUTHOR

Takao Komatsu, Mar 31 2013

STATUS

approved

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Last modified November 29 11:53 EST 2022. Contains 358424 sequences. (Running on oeis4.)