A009479 Expansion of sin(sin(x))/cos(x).

1, 1, 17, 201, 7041, 291025, 18979729, 1597285977, 176766161281, 24470008076193, 4166922390589073, 854427257015747305, 207778779976099167233, 59114568337761907619441

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