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 A264934 #15 Feb 16 2025 08:33:27
%S A264934 9,1,6,7,2,9,1,8,1,7,8,9,0,2,4,1,6,3,6,5,6,6,3,0,7,6,7,3,5,0,3,2,5,0,
%T A264934 1,8,9,5,1,7,5,8,9,9,9,6,2,1,9,4,2,7,2,2,9,8,1,6,3,9,6,0,2,2,4,2,6,8,
%U A264934 7,3,3,1,2,1,0,2,0,9,2,9,2,9,0,2,5,3,4,9,4,7,5,5,2,9,2,0,6,7,9,2,5,3,4,8,9,8,5,6,2
%N A264934 Decimal expansion of number with continued fraction expansion 0, 1, 11, 111, 1111, 11111 ... (the repunits).
%H A264934 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Repunit.html">Repunit</a>
%F A264934 Approximation: ~ -zeta(1/2) - sqrt(5)*exp(-sqrt(2)).
%e A264934 0.91672918178902416365663076735032501895175899962194272298… = 0 + 1/(1 + 1/(11 + 1/(111 + 1/(1111 + 1/(11111 + 1/(111111 + 1/(1111111 + 1/(11111111 + 1/...)))))))).
%t A264934 RealDigits@ N[FromContinuedFraction@ Prepend[Table[FromDigits@ Table[1, {n}], {n, 30}], 0], 110] // First (* _Michael De Vlieger_, Nov 28 2015 *)
%Y A264934 Cf. A002275.
%K A264934 nonn,cons
%O A264934 0,1
%A A264934 _Ilya Gutkovskiy_, Nov 28 2015