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A081052
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Difference of Stirling numbers of the first kind.
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4
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0, 1, -4, 17, -85, 499, -3388, 26200, -227708, 2199276, -23382216, 271461816, -3418002432, 46399476096, -675622445184, 10504980616320, -173726527230720, 3045008035203840, -56389237652344320, 1100174877158791680, -22556707790402304000, 484876713643386624000
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = s(n,2) - s(n,3), s(n,m) = signed Stirling number of the first kind.
E.g.f. (1+x)^-1 * (log(1+x) - (log(1+x)^2)/2).
Conjecture: a(n) +3*(n-1)*a(n-1) +(3*n^2-9*n+7)*a(n-2) +(n-2)^3*a(n-3)=0. - R. J. Mathar, Nov 24 2012
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MATHEMATICA
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Table[StirlingS1[n, 2]-StirlingS1[n, 3], {n, 30}] (* Harvey P. Dale, May 02 2012 *)
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PROG
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(PARI) for(n=1, 22, print1(stirling(n, 2) - stirling(n, 3), ", ")) \\ Indranil Ghosh, Mar 11 2017
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CROSSREFS
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KEYWORD
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easy,sign
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AUTHOR
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STATUS
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approved
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