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 A176522 #18 Jun 18 2024 03:26:00
%S A176522 9,1,0,9,7,7,2,2,2,8,6,4,6,4,4,3,6,5,5,0,0,1,1,3,7,1,4,0,8,8,1,3,9,6,
%T A176522 5,7,8,6,2,3,4,0,2,5,2,4,3,6,1,2,3,2,0,0,4,0,0,3,8,7,6,1,0,2,7,2,1,3,
%U A176522 3,5,5,1,3,4,0,0,9,3,7,7,3,0,3,8,3,9,4,7,0,4,5,3,9,6,6,4,0,2,8,2,4,7,0,1,6
%N A176522 Decimal expansion of (9+sqrt(85))/2.
%C A176522 Continued fraction expansion of (9+sqrt(85))/2 is A010734.
%H A176522 Wikipedia, <a href="https://en.wikipedia.org/wiki/Metallic_mean">Metallic mean</a>
%H A176522 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>
%F A176522 Equals lim_{n->infinity} S(n, sqrt(5*17))/S(n-1, sqrt(5*17)), with the S-Chebyshev polynomials (see A049310). - _Wolfdieter Lang_, Nov 15 2023
%e A176522 (9+sqrt(85))/2 = 9.10977222864644365500...
%t A176522 First[RealDigits[(9 + Sqrt[85])/2, 10, 100]] (* _Paolo Xausa_, Jun 18 2024 *)
%o A176522 (PARI) (9+sqrt(85))/2 \\ _Charles R Greathouse IV_, Jul 24 2013
%Y A176522 Cf. A010536 (decimal expansion of sqrt(85)), A010734 (all 9's sequence), A333345, A049310.
%K A176522 nonn,cons,easy
%O A176522 1,1
%A A176522 _Klaus Brockhaus_, Apr 23 2010