A013079 - OEIS

A013079

E.g.f.: sec(arcsinh(x)+log(x+1)) = 1 + 4/2!*x^2 - 6/3!*x^3 + 91/4!*x^4 - 470/5!*x^5 + ...

1, 0, 4, -6, 91, -470, 6100, -57225, 822065, -11044260, 184836950, -3164767375, 61845881375, -1272676666950, 28707736665400, -686107336312125, 17613438383958625, -478324499820401000, 13791544596522540250

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OFFSET

0,3

LINKS

Table of n, a(n) for n=0..18.

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Sec[ArcSinh[x]+Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Sep 07 2012 *)

CROSSREFS

Sequence in context: A245011 A375671 A012897 * A222495 A307101 A087934

Adjacent sequences: A013076 A013077 A013078 * A013080 A013081 A013082

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Definition clarified by Harvey P. Dale, Sep 07 2012

STATUS

approved