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A009193 Expansion of e.g.f.: exp(log(1+x)*cosh(x)). 1
1, 1, 0, 3, 6, -5, 135, -154, 1260, 6189, -33285, 470294, -2056758, 14299935, -3614611, -379101878, 10041282472, -121491285111, 1656259499511, -21619048472474, 338632378045750, -5874571029856693, 115201962050532137 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
FORMULA
E.g.f.: (1+x)^cosh(x). - Vaclav Kotesovec, Jul 28 2018
a(n) ~ (-1)^n * n! / (Gamma(-cosh(1)) * n^(1 + cosh(1))). - Vaclav Kotesovec, Jul 28 2018
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Exp[Log[1+x]*Cosh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 21 2017 *)
CROSSREFS
Sequence in context: A307132 A300673 A335633 * A144253 A152422 A332133
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, Jun 21 2017
STATUS
approved

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)