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A012163 cos(tan(arcsinh(x)))=1-1/2!*x^2-3/4!*x^4-21/6!*x^6+185/8!*x^8... 0

%I

%S 1,-1,-3,-21,185,-9641,1668021,-192801597,42064398961,-10576096455505,

%T 3476312353756781,-1396500495046819941,679259896835809126697,

%U -392775363671591649764601

%N cos(tan(arcsinh(x)))=1-1/2!*x^2-3/4!*x^4-21/6!*x^6+185/8!*x^8...

%K sign

%O 0,3

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

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Last modified July 2 18:27 EDT 2022. Contains 355029 sequences. (Running on oeis4.)