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 A228328 #9 Jan 27 2014 19:25:45 %S A228328 1,3,5,7,9,75,31,35,79,753,13,53,57,97,531,313,131,353,135,357,535, %T A228328 757,575,797,579,7531,3131,3135,3531,3535,3575,3579,7535,7575,7579, %U A228328 7975,7979,75313,1313,1353,1357,975,31313,5313,5353,5357,979,75353,5753,5757 %N A228328 Start with 1. Successive digits in the sequence must differ by 2. Adjoin the smallest number not yet in the sequence. %C A228328 Is the sequence infinite? %D A228328 Eric Angelini, Posting to the Sequence Fans Mailing List, Aug 23 2013. %H A228328 Alois P. Heinz, <a href="/A228328/b228328.txt">Table of n, a(n) for n = 1..10000</a> %Y A228328 Cf. A228326, A228327. %K A228328 nonn,base,look %O A228328 1,2 %A A228328 _N. J. A. Sloane_, Aug 24 2013 %E A228328 More terms from _Alois P. Heinz_, Aug 25 2013