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A009479 Expansion of sin(sin(x))/cos(x). 0
1, 1, 17, 201, 7041, 291025, 18979729, 1597285977, 176766161281, 24470008076193, 4166922390589073, 854427257015747305, 207778779976099167233, 59114568337761907619441 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

Take[With[{nn=40}, CoefficientList[Series[Sin[Sin[x]]/Cos[x], {x, 0, nn}], x]Range[0, nn-1]!], {2, -1, 2}] (* Harvey P. Dale, Sep 18 2011 *)

CROSSREFS

Sequence in context: A166216 A021134 A065895 * A279448 A017897 A016311

Adjacent sequences:  A009476 A009477 A009478 * A009480 A009481 A009482

KEYWORD

nonn

AUTHOR

R. H. Hardin

EXTENSIONS

Extended and signs tested Mar 15 1997 by Olivier Gérard.

STATUS

approved

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Last modified September 23 19:41 EDT 2020. Contains 337315 sequences. (Running on oeis4.)