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 A010505 #15 Feb 11 2025 14:42:52
%S A010505 7,2,1,1,1,0,2,5,5,0,9,2,7,9,7,8,5,8,6,2,3,8,4,4,2,5,3,4,9,4,0,9,9,1,
%T A010505 8,9,2,5,0,2,5,9,3,1,4,7,6,9,0,4,9,2,4,2,5,4,2,0,9,0,6,1,1,2,4,5,4,3,
%U A010505 3,3,8,9,6,5,8,6,0,2,0,8,9,0,4,0,9,2,3,8,1,6,4,0,3,6,9,8,1,4,3
%N A010505 Decimal expansion of square root of 52.
%C A010505 Continued fraction expansion is 7 followed by {4, 1, 2, 1, 4, 14} repeated. - _Harry J. Smith_, Jun 06 2009
%H A010505 Harry J. Smith, <a href="/A010505/b010505.txt">Table of n, a(n) for n = 1..20000</a>
%H A010505 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%e A010505 7.211102550927978586238442534940991892502593147690492425420906112454333...
%t A010505 RealDigits[N[Sqrt[52],200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Feb 24 2011 *)
%o A010505 (PARI) { default(realprecision, 20080); x=sqrt(52); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010505.txt", n, " ", d)); } \\ _Harry J. Smith_, Jun 06 2009
%Y A010505 Cf. A010138 Continued fraction. - _Harry J. Smith_, Jun 06 2009
%K A010505 nonn,cons
%O A010505 1,1
%A A010505 _N. J. A. Sloane_