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A013325
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Numerator of [x^n] in the Taylor series arccosh(exp(x)-arctanh(x))= x-x^2/6-x^3/72 -359*x^4/2160 -1681*x^5/51840 -52981*x^6/435456 -...
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1, -1, -1, -359, -1681, -52981, -1887113, -27492467, -3259141, -1194145112779, -55919619312049, -7462251938940527, -113201511292945547, -1055956853774285077, -44032898634010565651, -75833822693358307239889
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,4
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COMMENTS
| The inner function exp(x)-arctanh(x) = 1+x^2/2! -x^3/3! +x^4/4! -23*x^5/120 + x^6/6! -719*x^7/7!.. has e.g.f. coefficients apparently closely related to A127230.
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CROSSREFS
| Sequence in context: A175537 A142852 A158307 * A179678 A101996 A160523
Adjacent sequences: A013322 A013323 A013324 * A013326 A013327 A013328
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KEYWORD
| sign,frac
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AUTHOR
| Patrick Demichel (patrick.demichel(AT)hp.com)
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EXTENSIONS
| Values replaced by numerators. - R. J. Mathar, Dec 22 2011
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