%I A009719
%S A009719 1,3,17,371,11329,398211,31717649,2487281075,257775723265,
%T A009719 40422383525763,6249491749613201,1324448178268807283,
%U A009719 327217658581539104833,91010297536273890164739
%N A009719 Expansion of tan(tanh(x))/cos(x).
%t A009719 Tan[ Tanh[ x ] ]/Cos[ x ] (* Odd Part *)
%Y A009719 Sequence in context: A051294 A144033 A098138 this_sequence A128300 A001601 
               A061119
%Y A009719 Adjacent sequences: A009716 A009717 A009718 this_sequence A009720 A009721 
               A009722
%K A009719 nonn
%O A009719 0,2
%A A009719 R. H. Hardin (rhhardin(AT)att.net)
%E A009719 Extended and signs tested Mar 15 1997 by Olivier Gerard.