A012498 arcsin(cos(x)*arctan(x))=x-4/3!*x^3+8/5!*x^5+128/7!*x^7+25216/9!*x^9...

1, -4, 8, 128, 25216, -3387008, 160621056, -6497102848, 10675803193344, -4485074198855680, 823007646284349440, -188938583696417751040, 280059136770757168726016, -235157137580491486235983872

Offset

0,2

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Cos[x]ArcTan[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Nov 16 2019 *)

Crossrefs

Sequence in context: A193155 A060239 A127943 * A180745 A330860 A264510

Adjacent sequences: A012495 A012496 A012497 * A012499 A012500 A012501

Keyword

sign

Author

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

Status

approved