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A013281 sech(log(x+1)-arcsinh(x))=1-3/4!*x^4+30/5!*x^5-180/6!*x^6+945/7!*x^7... 0
1, 0, 0, 0, -3, 30, -180, 945, -6615, 56700, -368550, 1091475, 3274425, -85135050, 3235131900, -86199238125, 1340238524625, -15196606425000, 229968074085750, -4642248475990125, 57810007510880625 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
CROSSREFS
Sequence in context: A002463 A360645 A344564 * A013274 A013279 A013280
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified June 15 06:51 EDT 2024. Contains 373402 sequences. (Running on oeis4.)