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A012583
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Expansion of e.g.f.: sech(arcsinh(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-210/6!*x^6...
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0
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1, 0, 0, 0, -12, 60, -210, 1260, -4368, -42336, 833880, -9944880, 109031208, -998835552, 5256888000, 57628902240, -2552409700608, 53611141985664, -880205240332224, 12318269451041664, -115115298914746752
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OFFSET
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0,5
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LINKS
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MATHEMATICA
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With[{nn=20}, CoefficientList[Series[Sech[ArcSinh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Feb 20 2023 *)
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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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STATUS
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approved
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