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 A010507 #22 Feb 11 2025 10:00:54
%S A010507 7,3,4,8,4,6,9,2,2,8,3,4,9,5,3,4,2,9,4,5,9,1,8,5,2,2,2,4,1,1,7,6,7,4,
%T A010507 1,7,5,8,9,7,8,4,2,4,4,1,9,7,0,0,1,0,3,8,5,2,9,8,0,7,7,7,0,1,7,5,2,8,
%U A010507 8,1,1,3,2,3,7,1,9,4,5,0,7,9,6,1,9,5,7,8,2,9,9,3,1,3,9,2,0,7,0
%N A010507 Decimal expansion of square root of 54.
%C A010507 Continued fraction expansion is 7 followed by {2, 1, 6, 1, 2, 14} repeated. - _Harry J. Smith_, Jun 06 2009
%C A010507 Surface area to volume ratio of an octahedron with unit side length. - _Wesley Ivan Hurt_, May 02 2021
%H A010507 Harry J. Smith, <a href="/A010507/b010507.txt">Table of n, a(n) for n = 1..20000</a>
%H A010507 Wikipedia, <a href="https://en.wikipedia.org/wiki/Surface-area-to-volume_ratio">Surface-area-to-volume ratio</a>
%H A010507 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>.
%e A010507 7.348469228349534294591852224117674175897842441970010385298077701752881...
%t A010507 RealDigits[N[Sqrt[54],200]][[1]] (* _Vladimir Joseph Stephan Orlovsky_, Feb 24 2011 *)
%o A010507 (PARI) { default(realprecision, 20080); x=sqrt(54); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b010507.txt", n, " ", d)); } \\ _Harry J. Smith_, Jun 06 2009
%Y A010507 Cf. A010140 (continued fraction).
%K A010507 nonn,cons
%O A010507 1,1
%A A010507 _N. J. A. Sloane_