%I A012551
%S A012551 2,12,382,23352,2464922,398069892,91079960662,28062488827632,
%T A012551 11197997254599602,5618500857338248572,3461960315033768973742,
%U A012551 2569953015248391982844712,2262189595338137069466955082
%N A012551 arctanh(sinh(x)*tan(x))=2/2!*x^2+12/4!*x^4+382/6!*x^6+23352/8!*x^8...
%Y A012551 Sequence in context: A158261 A012547 A009706 this_sequence A156509 A051009 
               A060942
%Y A012551 Adjacent sequences: A012548 A012549 A012550 this_sequence A012552 A012553 
               A012554
%K A012551 nonn
%O A012551 0,1
%A A012551 Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)