%I A009433
%S A009433 0,1,1,1,0,11,15,27,504,11817,94185,1226455,12442056,155936221,
%T A009433 1995562569,27870901107,423463160400,6793396567633,117302680146033,
%U A009433 2130615128588591,40960288523646320,827190717641773765
%V A009433 0,1,-1,-1,0,-11,15,27,-504,11817,-94185,1226455,-12442056,155936221,
%W A009433 -1995562569,27870901107,-423463160400,6793396567633,-117302680146033,
%X A009433 2130615128588591,-40960288523646320,827190717641773765
%N A009433 Expansion of ln(1+x)/cosh(tan(x)).
%t A009433 Log[ 1+x ]/Cosh[ Tan[ x ] ]
%Y A009433 Sequence in context: A054280 A094766 A009407 this_sequence A030099 A085597 
               A097512
%Y A009433 Adjacent sequences: A009430 A009431 A009432 this_sequence A009434 A009435 
               A009436
%K A009433 sign,easy
%O A009433 0,6
%A A009433 R. H. Hardin (rhhardin(AT)att.net)
%E A009433 Extended with signs Mar 15 1997 by Olivier Gerard.