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 A068426 #20 Mar 27 2018 08:46:30 %S A068426 1,0,1,1,0,0,0,1,0,1,1,1,0,0,1,0,0,0,0,1,0,1,1,1,1,1,1,1,0,1,1,1,1,1, %T A068426 0,1,0,0,0,1,1,1,0,0,1,1,1,1,0,1,1,1,1,0,0,1,1,0,1,0,1,0,1,1,1,1,0,0, %U A068426 1,0,0,1,1,1,1,0,0,0,1,1,1,0,1,1,0,0,1,1,1,0,0,1,1,0,0,0,0,0,0,0,0,0,1,1,1 %N A068426 Expansion of log(2) in base 2. %H A068426 G. C. Greubel, <a href="/A068426/b068426.txt">Table of n, a(n) for n = 0..10000</a> %e A068426 0.10110001... = 1/2 + 1/8 + 1/16 + 1/256 + ... %t A068426 RealDigits[Log[2], 2, 100][[1]] (* _G. C. Greubel_, Mar 23 2018 *) %o A068426 (PARI) binary(log(2))[2] \\ _Michel Marcus_, Dec 14 2017 %Y A068426 Cf. A002162. %K A068426 base,cons,easy,nonn %O A068426 0,1 %A A068426 _Benoit Cloitre_, Mar 09 2002 %E A068426 Offset corrected by _R. J. Mathar_, Feb 05 2009