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 A160390 #16 Feb 15 2025 16:28:27
%S A160390 7,3,2,0,5,0,8,0,7,5,6,8,8,7,7,2,9,3,5,2,7,4,4,6,3,4,1,5,0,5,8,7,2,3,
%T A160390 6,6,9,4,2,8,0,5,2,5,3,8,1,0,3,8,0,6,2,8,0,5,5,8,0,6,9,7,9,4,5,1,9,3,
%U A160390 3,0,1,6,9,0,8,8,0,0,0,3,7,0,8,1,1,4,6,1,8,6,7,5,7,2,4,8,5,7,5,6,7,5,6,2,6
%N A160390 Decimal expansion of sqrt(3) - 1.
%C A160390 Continued fraction expansion leads to the ternary digital root of n.
%H A160390 Harry J. Smith, <a href="/A160390/b160390.txt">Table of n, a(n) for n = 0..20000</a>
%H A160390 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a>
%e A160390 0.732050807568877293527446341505872366942805253810380628055806979451933...
%t A160390 RealDigits[Sqrt[3]-1,10,120][[1]] (* _Harvey P. Dale_, Dec 16 2016 *)
%o A160390 (PARI) default(realprecision, 20080); x=10*(sqrt(3)-1); for (n=0, 20000, d=floor(x); x=(x-d)*10; write("b160390.txt", n, " ", d));
%o A160390 (Magma) SetDefaultRealField(RealField(100)); Sqrt(3) -1; // _G. C. Greubel_, Nov 20 2018
%o A160390 (Sage) numerical_approx(sqrt(3) -1, digits=100) # _G. C. Greubel_, Nov 20 2018
%Y A160390 Cf. A002194, A134451 (continued fraction).
%K A160390 nonn,cons
%O A160390 0,1
%A A160390 _Harry J. Smith_, May 31 2009