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 A010550 #15 Feb 11 2025 14:47:13
%S A010550 9,9,4,9,8,7,4,3,7,1,0,6,6,1,9,9,5,4,7,3,4,4,7,9,8,2,1,0,0,1,2,0,6,0,
%T A010550 0,5,1,7,8,1,2,6,5,6,3,6,7,6,8,0,6,0,7,9,1,1,7,6,0,4,6,4,3,8,3,4,9,4,
%U A010550 5,3,9,2,7,8,2,7,1,3,1,5,4,0,1,2,6,5,3,0,1,9,7,3,8,4,8,7,1,9,5
%N A010550 Decimal expansion of square root of 99.
%C A010550 Continued fraction expansion is 9 followed by {1, 18} repeated. - _Harry J. Smith_, Jun 12 2009
%H A010550 Harry J. Smith, <a href="/A010550/b010550.txt">Table of n, a(n) for n = 1..20000</a>
%H A010550 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%e A010550 9.949874371066199547344798210012060051781265636768060791176046438349453...
%t A010550 RealDigits[N[99^(1/2),200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Jan 24 2012 *)
%o A010550 (PARI) { default(realprecision, 20080); x=sqrt(99); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010550.txt", n, " ", d)); } \\ _Harry J. Smith_, Jun 12 2009
%Y A010550 Cf. A010170 Continued fraction.
%K A010550 nonn,cons
%O A010550 1,1
%A A010550 _N. J. A. Sloane_