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 A010522 #15 Aug 21 2023 12:34:05
%S A010522 8,3,6,6,6,0,0,2,6,5,3,4,0,7,5,5,4,7,9,7,8,1,7,2,0,2,5,7,8,5,1,8,7,4,
%T A010522 8,9,3,9,2,8,1,5,3,6,9,2,9,8,6,7,2,1,9,9,8,1,1,1,9,1,5,4,3,0,8,0,4,1,
%U A010522 8,7,7,2,5,9,4,3,1,7,0,0,9,8,3,0,8,1,4,7,1,1,9,6,4,9,5,1,5,3,6
%N A010522 Decimal expansion of square root of 70.
%C A010522 Continued fraction expansion is 8 followed by {2, 1, 2, 1, 2, 16} repeated. - _Harry J. Smith_, Jun 08 2009
%H A010522 Harry J. Smith, <a href="/A010522/b010522.txt">Table of n, a(n) for n = 1..20000</a>
%H A010522 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>
%e A010522 8.366600265340755479781720257851874893928153692986721998111915430804187....
%t A010522 RealDigits[N[70^(1/2),200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Jan 23 2012 *)
%o A010522 (PARI) default(realprecision, 20080); x=sqrt(70); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010522.txt", n, " ", d)); \\ _Harry J. Smith_, Jun 08 2009
%Y A010522 Cf. A010149 (continued fraction).
%K A010522 nonn,cons
%O A010522 1,1
%A A010522 _N. J. A. Sloane_