%I A009529
%S A009529 1,4,79664,627244864,10054978651904,281464457981584384,
%T A009529 9106562752258155720704,743620567656757236530855936,
%U A009529 627496952440053395297142177857536
%V A009529 1,-4,-79664,-627244864,-10054978651904,-281464457981584384,
%W A009529 -9106562752258155720704,743620567656757236530855936,
%X A009529 627496952440053395297142177857536
%N A009529 Expansion of tan(sin(x)).x/2.
%t A009529 Sin[ Tanh[ x ]*Tan[ x ] ]/2 (* [ x^(4n+2) ] *)
%Y A009529 A012667.
%Y A009529 Sequence in context: A074318 A102200 A066544 this_sequence A034209 A058430 
               A079286
%Y A009529 Adjacent sequences: A009526 A009527 A009528 this_sequence A009530 A009531 
               A009532
%K A009529 sign
%O A009529 0,2
%A A009529 R. H. Hardin (rhhardin(AT)att.net)
%E A009529 Extended with signs 03/97.