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 A104755 #6 May 04 2023 02:33:46
%S A104755 1,2,0,5,0,5,3,4,2,6,1,9,6,3,9,1,7,4,9,3,3,8,0,9,6,3,6,5,6,5,4,9,3,2,
%T A104755 1,0,6,8,6,6,5,1,1,1,8,5,7,1,8,9,3,4,8,4,6,1,8,1,0,6,6,0,5,3,0,9,0,3,
%U A104755 9,9,9,6,8,8,2,6,7,9,9,5,7,4,1,1,5,4,2,1,9,0,4,7,1,0,0,2,7,0,1,5,4,1,8,3,5
%N A104755 Decimal expansion of solution to x^(7^x) = 7.
%e A104755 1.20505342619639174933809636565493210686651118571893...
%t A104755 RealDigits[x /. FindRoot[x^(7^x) == 7, {x, 1}, WorkingPrecision -> 120]][[1]] (* _Amiram Eldar_, May 04 2023 *)
%o A104755 (PARI) solve(x = 1, 2, x^(7^x) - 7) \\ _Amiram Eldar_, May 04 2023
%Y A104755 Cf. A103561, A104750, A104751, A104752, A104753, A104754, A104756, A104757.
%K A104755 cons,nonn
%O A104755 1,2
%A A104755 _Zak Seidov_, Mar 23 2005
%E A104755 More terms from _Amiram Eldar_, May 04 2023