A013061 - OEIS

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A013061

cos(sinh(x)+arctan(x))=1-4/2!*x^2+24/4!*x^4-534/6!*x^6+27272/8!*x^8...

1, -4, 24, -534, 27272, -2170874, 260563908, -43811275382, 9816624434928, -2827858695802930, 1018209224687676028, -448073447471574806926, 236608835615446145622184, -147657298507133683247970826

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

LINKS

Table of n, a(n) for n=0..13.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Cos[Sinh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Jun 11 2024 *)

CROSSREFS

Sequence in context: A111425 A374068 A013100 * A071302 A211215 A249028

Adjacent sequences: A013058 A013059 A013060 * A013062 A013063 A013064

KEYWORD

sign

AUTHOR

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

STATUS

approved