A012146 - OEIS

A012146

arcsin(tan(sin(x)))=x+2/3!*x^3+16/5!*x^5+440/7!*x^7+27904/9!*x^9...

1, 2, 16, 440, 27904, 2850176, 425017984, 88153419008, 24337836937216, 8628418353065984, 3819956976511713280, 2065506026582536355840, 1339535792840983753424896, 1026285196477087825278599168

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OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Tan[Sin[x]]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, May 13 2019 *)

CROSSREFS

Sequence in context: A012030 A012682 A012678 * A113109 A223563 A140309

Adjacent sequences: A012143 A012144 A012145 * A012147 A012148 A012149

KEYWORD

nonn

AUTHOR

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

STATUS

approved