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%I #11 Mar 30 2012 17:40:22
%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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