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A013337 E.g.f.: cosh(exp(x)-sec(x))=1+1/2!*x^2+5/4!*x^4-20/5!*x^5+37/6!*x^6... 0
1, 0, 1, 0, 5, -20, 37, -700, 1017, -28584, 83769, -1514040, 9304605, -108745468, 1172343421, -11027747380, 169643707825, -1567659515472, 28786470143025, -295814371937904, 5793951884450549, -69644639946402276 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Cosh[Exp[x]-Sec[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jan 16 2013 *)

CROSSREFS

Sequence in context: A326005 A063110 A044066 * A031082 A161445 A238100

Adjacent sequences:  A013334 A013335 A013336 * A013338 A013339 A013340

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Definition clarified by Harvey P. Dale, Jan 16 2013

STATUS

approved

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Last modified August 4 16:18 EDT 2021. Contains 346447 sequences. (Running on oeis4.)