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A013312 tan(exp(x)-cos(x)) = x + 2/2!*x^2 + 3/3!*x^3 + 24/4!*x^4 + 157/5!*x^5... 0
0, 1, 2, 3, 24, 157, 962, 8575, 88816, 948025, 11551682, 158525499, 2329270152, 37012621141, 638280394754, 11767984017847, 230953513192672, 4823470878737521, 106685348433700994, 2489115873636707187 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

FORMULA

a(n) ~ n! / ((exp(r) + sin(r)) * r^(n+1)), where r = 0.814158996828781376878265969211452855533947645871032054776582... is the root of the equation exp(r)-cos(r) = Pi/2. - Vaclav Kotesovec, Feb 06 2015

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Tan[Exp[x]-Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 24 2011 *)

CROSSREFS

Sequence in context: A012304 A047157 A003221 * A013318 A193338 A326226

Adjacent sequences:  A013309 A013310 A013311 * A013313 A013314 A013315

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified July 21 17:43 EDT 2019. Contains 325198 sequences. (Running on oeis4.)