A012367 arcsin(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4+182/6!*x^6+4744/8!*x^8...

2, 4, 182, 4744, 529322, 48105484, 10255687262, 2093833598224, 726081240978002, 263899836304146964, 136202276398304865542, 76934684795610521975704, 55707277555172304209573882

Offset

0,1

Links

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

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcSin[Tan[x]Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Dec 31 2014 *)

Crossrefs

Sequence in context: A018611 A012369 A009609 * A165508 A018633 A307556

Adjacent sequences: A012364 A012365 A012366 * A012368 A012369 A012370

Keyword

nonn

Author

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

Status

approved