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A012517
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Expansion of e.g.f.: sec(sinh(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+450/6!*x^6-2940/7!*x^7...
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0
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1, 0, 0, 0, 12, -60, 450, -2940, 30800, -336672, 4362120, -57707760, 847204776, -13292039904, 228041125312, -4172767915680, 81658781501440, -1692115320051584, 37160192133050304, -860809698597753216
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history;
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internal format)
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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[Sec[Sinh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Feb 13 2022 *)
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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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