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 A303593 #6 May 27 2018 18:17:57 %S A303593 10,11,101,111,1011,1101,11101,10001,10011,10111,11111,101111,100101, %T A303593 101001,101011,111011,111101,110101,1100101,1000111,1000011,1001001, %U A303593 1001111,1100111,1100001,1101011,1101101,1111111,10111111,10010111,10000011,10001001,10001011 %N A303593 A294994(n) written in base 2. %H A303593 Robert G. Wilson v, <a href="/A303593/b303593.txt">Table of n, a(n) for n = 1..10000</a> %Y A303593 Cf. A294994, A303594. %K A303593 nonn %O A303593 1,1 %A A303593 _N. J. A. Sloane_, May 27 2018