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%I A009787 #10 Jun 22 2015 22:39:03
%S A009787 0,1,-1,-3,12,35,-435,-161,23968,-68811,-1874205,15189361,177102156,
%T A009787 -3209424153,-15134777567,750725838563,-828777844320,-197682938738071,
%U A009787 1577204564247783,55820827940141285,-1005440186803008980
%N A009787 Expansion of tanh(log(1+x)/cosh(x)).
%t A009787 Tanh[ Log[ 1+x ]/Cosh[ x ] ]
%K A009787 sign,easy
%O A009787 0,4
%A A009787 _R. H. Hardin_
%E A009787 Extended with signs by _Olivier Gérard_, Mar 15 1997

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