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 A004555 #41 Sep 08 2022 08:44:33 %S A004555 1,0,0,0,1,1,1,1,0,0,0,1,1,0,1,1,1,0,1,1,1,1,0,0,1,1,0,1,1,1,0,0,1,0, %T A004555 1,1,1,1,1,1,1,0,1,0,0,1,0,1,0,0,1,1,1,1,1,0,0,0,0,0,1,0,1,0,1,1,1,1, %U A004555 1,0,0,1,1,1,0,0,1,1,1,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1 %N A004555 Expansion of sqrt(5) in base 2. %H A004555 G. C. Greubel, <a href="/A004555/b004555.txt">Table of n, a(n) for n = 2..10000</a> (terms 2..1000 from Ivan Panchenko) %H A004555 Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/sqrt_base">Index of expansions of sqrt(d) in base b</a> %e A004555 10.0011110001101110111100110111001011111110100101001111100000101011111001110... %t A004555 RealDigits[Sqrt[5],2,120][[1]] (* _Harvey P. Dale_, Apr 08 2015 *) %o A004555 (Magma) d:= 5; m:=2; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // _G. C. Greubel_, Mar 31 2018 %K A004555 nonn,base,cons %O A004555 2,1 %A A004555 _N. J. A. Sloane_