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 A257344 #9 Apr 29 2015 11:04:35 %S A257344 1,10,111,100,10,1110,10101,1000,111111111,10,11,11100,1001,10010, %T A257344 1110,10000,11101,1111111110,100111,100,10101,110,1011011,111000 %N A257344 Erroneous version of A004290. %C A257344 Included in accordance with OEIS policy of including published but erroneous sequences so as to give links to the correct versions. %D A257344 Popular Computing (Calabasas, CA), Z-Sequences, Vol. 4 (No. 34, Apr 1976), pages PC36-4 to PC37-6, but there are many errors (cf. A079339, A004290). %Y A257344 Cf. A079339, A004290. %K A257344 dead %O A257344 1,2 %A A257344 _N. J. A. Sloane_, Apr 29 2015