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A009264 Expansion of e.g.f.: exp(tanh(x))/cos(x). 2
1, 1, 2, 2, 4, 12, 128, 464, 1296, 336, 85600, 838752, 4372160, -11036608, 148860416, 5128035072, 54261590272, -109537337088, -1474575037952, 68456854604288, 1579094994228224, 1239349299477504, -145025202842173440 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Exp[Tanh[x]]/Cos[x], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 14 2018 *)
CROSSREFS
Sequence in context: A208529 A212660 A098774 * A048157 A130797 A362262
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified and prior Mathematica program replaced by Harvey P. Dale, Mar 14 2018
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)