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A013233
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Expansion of e.g.f.: sech(log(x+1)-arcsin(x))=1-3/4!*x^4+10/5!*x^5-100/6!*x^6+525/7!*x^7...
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0
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1, 0, 0, 0, -3, 10, -100, 525, -4935, 32940, -339750, 2618275, -30387775, 251013750, -3301268100, 26222434875, -400587471375, 2197651183000, -45694778418250, -233584427890125, -1331937583104375
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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=30}, CoefficientList[Series[Sech[Log[x+1]-ArcSin[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Oct 14 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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STATUS
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approved
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