A012628 - OEIS

A012628

arcsinh(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4+118/6!*x^6+168/8!*x^8...

2, -12, 118, 168, -72918, -19180260, 7673967390, -1668580628400, 206209417380690, 17149380702207300, -8171629445251404090, -13542042383228350058760, 18432243823017229137614970

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OFFSET

0,1

LINKS

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

MATHEMATICA

With[{nn=30}, Rest[Take[CoefficientList[Series[ArcSinh[ ArcSinh[x] ArcTan[x]], {x, 0, nn}], x]Range[0, nn]!, {1, -1, 2}]]] (* Harvey P. Dale, Dec 30 2012 *)

CROSSREFS

Sequence in context: A377716 A372200 A290840 * A012623 A009742 A279201

Adjacent sequences: A012625 A012626 A012627 * A012629 A012630 A012631

KEYWORD

sign

AUTHOR

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

STATUS

approved