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 A004569 #28 Sep 08 2022 08:44:33 %S A004569 1,0,1,0,1,0,0,1,0,1,0,1,0,0,1,1,1,1,1,1,1,1,0,1,0,1,0,0,1,1,1,0,1,0, %T A004569 0,1,0,1,1,1,1,1,0,0,0,1,1,1,0,1,0,0,1,1,0,1,1,0,1,1,1,1,0,0,0,1,1,1, %U A004569 0,0,1,1,1,0,1,0,1,0,0,1,1,1,1,1,1,0,0,1,1,0,0,0,0,1,1,1,1,1,1 %N A004569 Expansion of sqrt(7) in base 2. %H A004569 G. C. Greubel, <a href="/A004569/b004569.txt">Table of n, a(n) for n = 2..10000</a> (terms 2..1000 from Ivan Panchenko) %H A004569 Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/sqrt_base">Index of expansions of sqrt(d) in base b</a> %p A004569 convert(evalf(sqrt(7),100),binary,100); # _Wesley Ivan Hurt_, Jan 28 2017 %t A004569 RealDigits[Sqrt[7],2,120][[1]] (* _Harvey P. Dale_, Jan 18 2012 *) %o A004569 (Magma) d:= 7; m:=2; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // _G. C. Greubel_, Mar 26 2018 %Y A004569 Cf. A010465. %K A004569 nonn,base,cons %O A004569 2,1 %A A004569 _N. J. A. Sloane_