%I A013570
%S A013570 1,9,0,1,7,4977,219,1039,11570,33344784,995254,7720297,126624718,
%T A013570 4415407356,22344623929,241815032188,5222279193717,86652127610560844,
%U A013570 1561364880901471,21735423877239687,581233980566953138
%V A013570 1,-9,0,1,7,-4977,219,1039,11570,-33344784,995254,7720297,126624718,
%W A013570 -4415407356,22344623929,241815032188,5222279193717,
%X A013570 -86652127610560844,1561364880901471,21735423877239687
%N A013570 log(arctan(x)/log(x+1))=x-9/2!*x^2+1/4!*x^4+7/5!*x^5-4977/6!*x^6...
%Y A013570 Sequence in context: A021530 A110909 A118811 this_sequence A065471 A089481 
               A065421
%Y A013570 Adjacent sequences: A013567 A013568 A013569 this_sequence A013571 A013572 
               A013573
%K A013570 sign
%O A013570 0,2
%A A013570 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)