A096664 Numerators of terms in series expansion of sin(tan(x)).

1, 1, -1, -55, -143, -968167, -7000033, -571772647, -843598411471, -1263845119891, -740683182137153, -474904166544135457, 2379183287545454197, 237037449673450822122569, 155015924346163216960553093, 50568039962561468889366023, 1801162678607996830733199407999, 2359789149102567189423591182268559

Offset: 0

Author

N. J. A. Sloane, Aug 15 2004

Keywords

• sign
• frac

Examples

			sin(tan(x)) = x + 1/6*x^3 - 1/40*x^5 - 55/1008*x^7 - 143/3456*x^9 + ...
		

Links

• G. C. Greubel, Table of n, a(n) for n = 0..200

Crossrefs

Cf. A096671, A096712, A096716, A045688, A045689, A096717, A096718.

Cf. A003706.

Programs

Mathematica

Numerator[Take[CoefficientList[Series[Sin[Tan[x]], {x,0,40}], x], {2,-1,2}]] (* G. C. Greubel, Nov 17 2016 *)