A012446 arcsin(arctan(x)*tan(x))=2/2!*x^2+280/6!*x^6-2688/8!*x^8+1016608/10!*x^10...

2, 0, 280, -2688, 1016608, -44971520, 22528934272, -2475890192384, 1731096311210496, -365422134993502208, 343466758613102303232, -121096429560806448922624, 146997236520941470929985536

Offset

0,1

Links

Table of n, a(n) for n=0..12.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTan[x]Tan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Nov 05 2013 *)

Crossrefs

Sequence in context: A012330 A012336 A012449 * A324687 A012755 A012452

Adjacent sequences: A012443 A012444 A012445 * A012447 A012448 A012449

Keyword

sign

Author

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

Status

approved