A012435 arctan(arctan(x)*arcsin(x))=2/2!*x^2-4/4!*x^4-82/6!*x^6+3096/8!*x^8...

2, -4, -82, 3096, 256122, -30668460, 856747110, 523284711600, 39637940511090, -50848285138290900, 19464791037179683230, 1825136551296140381640, 99500526939660052179690, -1613956014788908960338116220, 2918159856709476758087519928150

Offset

0,1

Links

Table of n, a(n) for n=0..14.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[ArcTan[ArcTan[x]ArcSin[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 2}]] (* Harvey P. Dale, Nov 05 2014 *)

Crossrefs

Sequence in context: A322704 A076961 A012439 * A121103 A018397 A259137

Adjacent sequences: A012432 A012433 A012434 * A012436 A012437 A012438

Keyword

sign

Author

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

Extensions

Definition clarified by and more terms from Harvey P. Dale, Nov 05 2014

Status

approved