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 A231889 #16 Nov 21 2013 08:11:51 %S A231889 0,10,101,100,1,1001,111,1010,1000,11,10000,110,1011,10001,1101,10010, %T A231889 1110,10011,1100,10101,10100,1111,11000,10110,11001,11010,11100, %U A231889 100001,10111,100000,11011,100010,11101 %N A231889 Base 2 analog of A231880 (written in base 2). %C A231889 A231889 (and A231890) eventually merges with A231891 (and A231892). For n>30, a(n) = A231891(n-1). - _Hans Havermann_, Nov 18 2013 %H A231889 Hans Havermann, <a href="/A231889/b231889.txt">Table of n, a(n) for n = 0..1000</a> %Y A231889 Cf. A228407, A231880, A231881, A231889, A231890, A231891, A231892. %K A231889 nonn,base %O A231889 0,2 %A A231889 _N. J. A. Sloane_, Nov 17 2013 %E A231889 More terms from _Hans Havermann_, Nov 18 2013