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A012496 exp(cos(x)*arctan(x))=1+x+1/2!*x^2-4/3!*x^3-19/4!*x^4+445/6!*x^6... 0
1, 1, 1, -4, -19, 0, 445, 1304, -14663, -109120, 718265, 10816896, -50970203, -1441841024, 4876389557, 258762139648, -548752599567, -60872480247808, 47436062951281, 18224782774259712, 12631837146241245 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..20.

MATHEMATICA

With[{nn=25}, CoefficientList[Series[Exp[Cos[x]ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Oct 01 2011 *)

CROSSREFS

Sequence in context: A287677 A069874 A222323 * A024572 A009267 A009275

Adjacent sequences:  A012493 A012494 A012495 * A012497 A012498 A012499

KEYWORD

sign

AUTHOR

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

STATUS

approved

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Last modified October 23 16:40 EDT 2020. Contains 337969 sequences. (Running on oeis4.)