%I A012188
%S A012188 1,2,16,272,256,1758208,549115904,178127730688,68157333438464,
%T A012188 31349506823815168,17274394522483687424,11298666083444901019648,
%U A012188 8681212227186028691062784,7756335594110841587790512128
%V A012188 1,-2,16,-272,256,1758208,-549115904,178127730688,-68157333438464,
%W A012188 31349506823815168,-17274394522483687424,11298666083444901019648,
%X A012188 -8681212227186028691062784,7756335594110841587790512128
%N A012188 sinh(arctan(sin(x)))=x-2/3!*x^3+16/5!*x^5-272/7!*x^7+256/9!*x^9...
%Y A012188 Sequence in context: A114039 A090305 A050974 this_sequence A009764 A000182 
               A102599
%Y A012188 Adjacent sequences: A012185 A012186 A012187 this_sequence A012189 A012190 
               A012191
%K A012188 sign
%O A012188 0,2
%A A012188 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)