%I
%S 2,-15,713,-83153,18098465,-6328374393,3245239225473,
%T -2294518136964753,2139313609395769025,-2543121979063032972521,
%U 3754239719924358293059361,-6738064500911247767580261057
%N arctan(arcsinh(x)+tan(x))=2*x-15/3!*x^3+713/5!*x^5-83153/7!*x^7...
%K sign
%O 0,1
%A Patrick Demichel (patrick.demichel(AT)hp.com)
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