Search: id:A009722
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%I A009722
%S A009722 1,176,570496,9223556096,460993706622976,55266063875773300736,
%T A009722 13556412676746128524312576,6098119622978353294582319415296,
%U A009722 4642750780653941150969313976486199296
%N A009722 Expansion of tan(x)*sin(x)/2.
%t A009722 Tan[ Tanh[ x ]*Tan[ x ] ]/2 (* [ x^(4n+2) ] *)
%Y A009722 A012669.
%Y A009722 Sequence in context: A158818 A035829 A159426 this_sequence A159442 A046189 
               A164843
%Y A009722 Adjacent sequences: A009719 A009720 A009721 this_sequence A009723 A009724 
               A009725
%K A009722 nonn
%O A009722 0,2
%A A009722 R. H. Hardin (rhhardin(AT)att.net)
%E A009722 Extended and signs tested 03/97.

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