

A130190


Denominators of zsequence for the Sheffer matrix (triangle) A094816 (coefficients of PoissonCharlier polynomials).


3



1, 2, 6, 4, 15, 12, 42, 24, 90, 10, 33, 8, 910, 105, 90, 48, 255, 180, 3990, 420, 6930, 330, 345, 720, 13650, 273, 378, 28, 145, 20, 14322, 2464, 117810, 3570, 7, 24, 1919190, 1729, 2730, 840, 9471, 13860, 99330, 1540, 217350, 4830, 4935, 10080, 324870
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OFFSET

0,2


COMMENTS

The numerators are given in A130189.
See A130189 for the W. Lang link on zsequences for Sheffer matrices.


LINKS

Table of n, a(n) for n=0..48.


FORMULA

a(n)=denominator(z(n)),n>=0, with the e.g.f. for z(n) given in A130189.
Denominator of Sum_{k=0..n} A048993(n,k)/(k+1). [From Peter Luschny, Apr 28 2009]


MAPLE

seq(denom(add(stirling2(n, k)/(k+1), k=0..n)), n=0..20); [From Peter Luschny, Apr 28 2009]


CROSSREFS

Sequence in context: A111807 A069914 A200746 * A110346 A095754 A226718
Adjacent sequences: A130187 A130188 A130189 * A130191 A130192 A130193


KEYWORD

nonn,easy


AUTHOR

Wolfdieter Lang Jun 01 2007


STATUS

approved



