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A012405 Expansion of e.g.f.: cosh(arctan(x)*log(x+1))=1+12/4!*x^4-60/5!*x^5+90/6!*x^6-420/7!*x^7... 0
1, 0, 0, 0, 12, -60, 90, -420, 15008, -149184, 572040, -4263600, 153746472, -2274880608, 14574976416, -151922927520, 6077379610368, -119360435727744, 1090133783570880, -14675613664063104 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Cosh[ArcTan[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 22 2019 *)
CROSSREFS
Sequence in context: A009093 A012400 A009172 * A012657 A012406 A097191
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, Jun 22 2019
STATUS
approved

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Last modified March 29 07:27 EDT 2024. Contains 371265 sequences. (Running on oeis4.)