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Decimal expansion of the limit of the nested tanh(1+tanh(2+tanh(3+tanh(4+...)))).
1

%I #11 Apr 10 2017 23:32:30

%S 9,6,3,6,7,6,0,5,1,2,0,6,6,0,3,7,4,4,5,0,5,2,7,6,3,2,7,7,0,6,8,9,7,1,

%T 1,2,8,1,4,6,6,6,1,7,0,9,1,0,8,5,1,1,0,5,4,5,9,3,6,5,4,1,1,8,7,9,0,6,

%U 7,0,9,8,3,1,7,8,9,3,9,7,1,4,8,8,7,9,1,5,3,4,5,0,9,4,3,8,9,6,7

%N Decimal expansion of the limit of the nested tanh(1+tanh(2+tanh(3+tanh(4+...)))).

%C No closed form expression is known.

%C Probably transcendental but this is unproved.

%e 0.9636760512066037445052763277068971128146661709108511054593654118790670983...

%t RealDigits[ Fold[ Tanh[#1 + #2] &, 0, Reverse[ Range@ 16]], 10, 111][[1]]

%K nonn,cons

%O 0,1

%A _Robert G. Wilson v_, Apr 09 2017