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A009716 Expansion of e.g.f. tan(tanh(x))*exp(x). 1
0, 1, 2, 3, 4, -3, -42, -49, 456, 2905, 10154, -83589, -1263668, -334059, 74121726, 351159815, -1582556016, -39776495567, -396499390126, 2339943411315, 87145255604884, 181395497796525, -10528569148387290, -87834301596283969 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Tan[Tanh[x]]Exp[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jul 27 2013 *)
CROSSREFS
Sequence in context: A283832 A102086 A009184 * A009590 A009492 A009810
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified and Mathematica program replaced by Harvey P. Dale, Jul 27 2013
STATUS
approved

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Last modified March 4 23:31 EST 2024. Contains 370537 sequences. (Running on oeis4.)