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A130190 Denominators of z-sequence for the Sheffer matrix (triangle) A094816 (coefficients of Poisson-Charlier 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The numerators are given in A130189.

See A130189 for the W. Lang link on z-sequences 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

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Last modified April 16 21:07 EDT 2014. Contains 240627 sequences.