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A012014 arctan(sin(tan(x)))=x-1/3!*x^3+1/5!*x^5-169/7!*x^7-1823/9!*x^9... 0

%I

%S 1,-1,1,-169,-1823,-365905,-17126303,-3688466617,-393996411839,

%T -109259290725793,-20477152840654271,-7401734340295771849,

%U -2112803982091750971359,-978357645904185043693297

%N arctan(sin(tan(x)))=x-1/3!*x^3+1/5!*x^5-169/7!*x^7-1823/9!*x^9...

%t With[{nn=30},Take[CoefficientList[Series[ArcTan[Sin[Tan[x]]],{x,0,nn}], x] Range[0,nn-1]!,{2,-1,2}]] (* _Harvey P. Dale_, Jun 04 2014 *)

%K sign

%O 0,4

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

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Last modified January 28 20:22 EST 2022. Contains 350659 sequences. (Running on oeis4.)