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 A068086 #7 May 04 2021 15:34:10 %S A068086 1,0,100,1000,1100,10,100,110100,1010,10,10010,100000,10110,1110, %T A068086 1000010,1011000,1010,1000,0,101010,10000,100000,0,1000000,1011000, %U A068086 101100,111100,1110,100010,1010000,1101010,101010,100100,10 %N A068086 a(n) = A036229(n) - 111...1 (with n 1's). %H A068086 Alois P. Heinz, <a href="/A068086/b068086.txt">Table of n, a(n) for n = 1..400</a> %Y A068086 Cf. A036229. %K A068086 nonn %O A068086 1,3 %A A068086 _Robert G. Wilson v_, May 04 2002