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 A264808 #16 Jan 26 2020 14:44:56 %S A264808 1,6,0,1,0,7,5,1,5,3,9,2,3,7,2,8,7,7,9,3,2,7,0,6,4,7,6,7,7,4,7,8,3,5, %T A264808 4,5,9,5,3,1,5,9,5,8,0,4,9,6,3,4,5,2,8,9,0,7,7,2,1,8,2,0,9,9,1,3,1,1, %U A264808 6,0,2,2,7,1,5,4,0,9,0,3,2,2,0,5,8,5,4,9 %N A264808 Decimal expansion of the positive root of x^(x^x) = e. %e A264808 1.6010751539237287793270647677478354595315958049634528907721820991... %o A264808 (PARI) default(realprecision,2000);solve(x=0.01, 2, x^(x^x)-exp(1)) %Y A264808 Cf. A001113, A264807. %K A264808 nonn,cons %O A264808 1,2 %A A264808 _Anders Hellström_, Nov 25 2015