A012759 - OEIS

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A012759

Expansion of e.g.f.: arctan(cosh(x)*log(x+1))=x-1/2!*x^2+3/3!*x^3-57/5!*x^5+405/6!*x^6...

0, 1, -1, 3, 0, -57, 405, -1827, -4424, 223541, -2901285, 19263167, 121524216, -6372341445, 112206095729, -915357416711, -12418256340720, 674275623382473, -14438518400518281, 129951850481453275

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

With[{nn=20}, CoefficientList[Series[ArcTan[Cosh[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jan 06 2014 *)

CROSSREFS

Sequence in context: A193410 A271762 A264882 * A296621 A120953 A009784

Adjacent sequences: A012756 A012757 A012758 * A012760 A012761 A012762

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Definition clarified and zero prepended by Harvey P. Dale, Jan 06 2014

STATUS

approved