This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A276538 #11 Apr 10 2017 23:32:30 %S A276538 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 A276538 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 A276538 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 A276538 Decimal expansion of the limit of the nested tanh(1+tanh(2+tanh(3+tanh(4+...)))). %C A276538 No closed form expression is known. %C A276538 Probably transcendental but this is unproved. %e A276538 0.9636760512066037445052763277068971128146661709108511054593654118790670983... %t A276538 RealDigits[ Fold[ Tanh[#1 + #2] &, 0, Reverse[ Range@ 16]], 10, 111][[1]] %K A276538 nonn,cons %O A276538 0,1 %A A276538 _Robert G. Wilson v_, Apr 09 2017