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A175671 Denominator of [x^(2n)] of the Taylor expansion log(cosec(x)*arctan(x))= -x^2/6 +3*x^4/20 -50*x^6/567 +203*x^8/3240 -7472*x^10/155925 +... 1

%I

%S 1,6,20,567,3240,155925,8292375,147349125,312615903600,

%T 103180488035625,769328200265625,316985199315159375,

%U 8682638068197843750,165206922515800790625,527010082825404522093750,39040543480476432234965625,33712429605969723121012500000,1968441947987203748028891796875

%N Denominator of [x^(2n)] of the Taylor expansion log(cosec(x)*arctan(x))= -x^2/6 +3*x^4/20 -50*x^6/567 +203*x^8/3240 -7472*x^10/155925 +...

%Y Cf. A012857 (numerators).

%K nonn,frac

%O 0,2

%A _R. J. Mathar_, Dec 20 2011

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Last modified April 14 22:47 EDT 2021. Contains 342971 sequences. (Running on oeis4.)