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Search: id:A130190
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| A130190 |
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Denominators of z-sequence for the Sheffer matrix (triangle) A094816 (coefficients of Poisson-Charlier polynomials). |
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+0
4
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| 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; listen)
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OFFSET
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0,2
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COMMENT
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The numerators are given in A130189.
See A130189 for the W. Lang link on z-sequences for Sheffer matrices.
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FORMULA
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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 (peter(AT)luschny.de), Apr 28 2009]
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MAPLE
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seq(denom(add(stirling2(n, k)/(k+1), k=0..n)), n=0..20); [From Peter Luschny (peter(AT)luschny.de), Apr 28 2009]
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CROSSREFS
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Sequence in context: A064462 A111807 A069914 this_sequence A110346 A095754 A127320
Adjacent sequences: A130187 A130188 A130189 this_sequence A130191 A130192 A130193
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jun 01 2007
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