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A013065 cosh(sinh(x)+arctan(x))=1+4/2!*x^2+8/4!*x^4+214/6!*x^6-2120/8!*x^8... 0
1, 4, 8, 214, -2120, 244474, -19663636, 2667954774, -459657139376, 101692759589938, -27454474974890796, 8721787160293603566, -3104642361378992916296, 1136421744211874484529546, -323876090606312632256434308, -96053520783771304241293234554 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Cosh[Sinh[x]+ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Feb 07 2015 *)
CROSSREFS
Sequence in context: A188268 A133262 A120822 * A013096 A200729 A116092
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
More terms from Harvey P. Dale, Feb 07 2015
STATUS
approved

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Last modified February 29 05:57 EST 2024. Contains 370401 sequences. (Running on oeis4.)