A013255 - OEIS

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A013255

E.g.f.: cosh(log(x+1)-arctan(x))=1+3/4!*x^4-40/5!*x^5+250/6!*x^6-840/7!*x^7...

1, 0, 0, 0, 3, -40, 250, -840, 4725, -97200, 1188900, -7994800, 66364375, -1544127000, 26899674750, -278709795000, 3240888275625, -85063768972000, 1886327500213000, -26696356464492000, 405832799545216875

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

OFFSET

0,5

LINKS

Table of n, a(n) for n=0..20.

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Cosh[Log[x+1]-ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 24 2013 *)

CROSSREFS

Sequence in context: A283115 A013257 A013250 * A013256 A013293 A013286

Adjacent sequences: A013252 A013253 A013254 * A013256 A013257 A013258

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Definition clarified by Harvey P. Dale, Jun 24 2013

STATUS

approved