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A012874
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Expansion of e.g.f.: arcsinh(sech(x)*log(x+1))=x-1/2!*x^2-2/3!*x^3+6/4!*x^4+33/5!*x^5...
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0
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0, 1, -1, -2, 6, 33, -285, -30, 13580, -35987, -1418445, 14453470, 125352282, -3470151531, -8211284081, 1077876542834, -6851721057480, -332020513124583, 5842787569074567, 104612291816295422
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OFFSET
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1,4
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[ArcSinh[Sech[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Oct 22 2019 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
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Zero prepended and definition clarified by Harvey P. Dale, Oct 22 2019
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STATUS
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approved
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