A029589 Expansion of (1+sin(x)+sin(x)^2)/(1-sin(x)+sin(x)^2).

1, 2, 4, -2, -64, -238, 1024, 18478, 64256, -1078558, -16672256, -22614242, 2401458176, 32373060722, -117093134336, -9756500186162, -106877784162304, 1553450981649602, 64518260702838784, 465844716994278718

Offset

0,2

Links

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

Mathematica

With[{nn=20}, CoefficientList[Series[(1+Sin[x]+Sin[x]^2)/(1-Sin[x]+ Sin[x]^2), {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, May 24 2021 *)

Crossrefs

Sequence in context: A301460 A130172 A303320 * A121819 A134138 A351427

Adjacent sequences: A029586 A029587 A029588 * A029590 A029591 A029592

Keyword

sign

Author

N. J. A. Sloane.

Status

approved