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A012846 sinh(sec(x)*arctanh(x))=x+6/3!*x^3+120/5!*x^5+5376/7!*x^7... 0
1, 6, 120, 5376, 415104, 48143744, 7784817664, 1673986906112, 462531126525952, 159859054841331712, 67616604530628853760, 34373912421215807799296, 20685291456673100857344000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Sinh[Sec[x]ArcTanh[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Oct 22 2014 *)
CROSSREFS
Sequence in context: A094278 A093910 A002370 * A331640 A012641 A012795
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified June 15 01:02 EDT 2024. Contains 373402 sequences. (Running on oeis4.)