%I A013540
%S A013540 1,0,7,3,2354,614,12609,511465,8778184775,1439863636,60634748503370,
%T A013540 10164567364169,1158337190520188,147712142913341929
%V A013540 -1,0,-7,3,-2354,614,-12609,511465,-8778184775,1439863636,
%W A013540 -60634748503370,10164567364169,-1158337190520188,
%X A013540 147712142913341929
%N A013540 arctan(cosec(x)-cotanh(x))=-x-7/5!*x^5+3/7!*x^7-2354/9!*x^9...
%Y A013540 Sequence in context: A086453 A112099 A013544 this_sequence A110792 A093825 
               A091494
%Y A013540 Adjacent sequences: A013537 A013538 A013539 this_sequence A013541 A013542 
               A013543
%K A013540 sign
%O A013540 0,3
%A A013540 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)