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A009660 Expansion of tan(sin(tanh(x))). 0
1, -1, -7, 447, -19471, 612127, 37384233, -15027743521, 3099354722529, -493631745542209, 34013990822822489, 22054949830590352511, -16492842082602835130159, 7774163613641172354365407 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Tan[Sin[Tanh[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Jan 18 2019 *)
CROSSREFS
Sequence in context: A269555 A027876 A158599 * A024097 A203060 A261479
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Previous Mathematica program replaced by Harvey P. Dale, Jan 18 2019
STATUS
approved

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Last modified March 1 16:12 EST 2024. Contains 370442 sequences. (Running on oeis4.)