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 A246967 #24 Feb 16 2025 08:33:23
%S A246967 6,2,9,3,3,4,0,9,4,0,0,9,3,7,2,7,6,7,5,5,6,4,8,0,5,0,2,5,8,9,3,2,6,1,
%T A246967 3,7,6,4,7,2,0,7,6,4,6,8,6,6,1,8,5,3,5,5,0,6,8,8,5,8,0,2,3,1,9,7,2,6,
%U A246967 9,2,8,5,2,9,1,5,5,7,4,6,2,1,1,0,4,2,0,0,7,9,7,5,5,6,1,9,4
%N A246967 Decimal expansion of the real positive solution to eta(x) = x.
%C A246967 Fixed point of Dirichlet eta function.
%H A246967 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DirichletEtaFunction.html">Dirichlet Eta Function</a>.
%H A246967 Wikipedia, <a href="http://en.wikipedia.org/wiki/Dirichlet_eta_function">Dirichlet Eta Function</a>.
%e A246967 0.6293340940...
%t A246967 RealDigits[x /. FindRoot[DirichletEta[x] - x, {x, 0}, WorkingPrecision -> 120], 10, 100] [[1]] (* _Amiram Eldar_, May 24 2021 *)
%o A246967 (PARI) solve(n=0,2,(1-2^(1-n))*zeta(n)-n) \\ _Edward Jiang_, Sep 08 2014
%Y A246967 Cf. A197070, A267315, A267316.
%K A246967 nonn,cons
%O A246967 0,1
%A A246967 _Michal Paulovic_, Sep 08 2014