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 A010520 #15 Feb 11 2025 14:44:53
%S A010520 8,2,4,6,2,1,1,2,5,1,2,3,5,3,2,1,0,9,9,6,4,2,8,1,9,7,1,1,9,4,8,1,5,4,
%T A010520 0,5,0,2,9,4,3,9,8,4,5,0,7,4,7,2,4,0,8,6,8,7,9,7,2,6,7,1,4,6,1,8,9,9,
%U A010520 0,8,6,9,2,6,7,5,2,4,3,1,8,7,1,7,5,7,2,7,3,0,1,6,2,1,3,6,8,5,9
%N A010520 Decimal expansion of square root of 68.
%C A010520 Continued fraction expansion is 8 followed by {4, 16} repeated. - _Harry J. Smith_, Jun 08 2009
%H A010520 Harry J. Smith, <a href="/A010520/b010520.txt">Table of n, a(n) for n = 1..20000</a>
%H A010520 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%e A010520 8.246211251235321099642819711948154050294398450747240868797267146189908...
%t A010520 RealDigits[N[68^(1/2),200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Jan 22 2012 *)
%o A010520 (PARI) { default(realprecision, 20080); x=sqrt(68); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010520.txt", n, " ", d)); } \\ _Harry J. Smith_, Jun 08 2009
%Y A010520 Cf. A040059 Continued fraction.
%K A010520 nonn,cons
%O A010520 1,1
%A A010520 _N. J. A. Sloane_