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 A004541 #15 Sep 08 2022 08:44:33 %S A004541 1,1,2,2,2,0,0,2,1,3,2,1,2,1,2,1,3,3,3,0,3,2,3,3,0,3,0,2,1,0,0,2,0,2, %T A004541 3,0,2,3,3,2,3,0,1,0,3,1,2,1,2,3,2,2,2,2,1,1,1,1,3,3,1,0,3,3,2,0,3,2, %U A004541 2,3,1,3,2,3,0,0,1,1,3,1,1,0,1,0,2,1,3,1,3,1,1,0,0,2,1,2,1,3,1 %N A004541 Expansion of sqrt(2) in base 4. %H A004541 G. C. Greubel, <a href="/A004541/b004541.txt">Table of n, a(n) for n = 1..10000</a> %H A004541 Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/sqrt_base">Index of expansions of sqrt(d) in base b</a> %t A004541 RealDigits[Sqrt[2], 4, 100][[1]] (* _G. C. Greubel_, Mar 31 2018 *) %o A004541 (Magma) d:= 2; m:=4; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // _G. C. Greubel_, Mar 31 2018 %K A004541 nonn,base,cons %O A004541 1,3 %A A004541 _N. J. A. Sloane_