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 A119253 #5 Oct 10 2013 02:30:08
%S A119253 1,3,5,7,9,13,15,17,19,35,37,39,57,59,79,135,137,139,157,159,179,357,
%T A119253 359,379,579,1357,1359,1379,1579,3579,13579
%N A119253 Odd digits in increasing order.
%C A119253 This is the complete list of all 31 such numbers.
%t A119253 Flatten@Table[FromDigits/@Subsets[Range[1,9,2],{n}],{n,1,5}]
%Y A119253 Cf. A119252 Odd digits in decreasing order, A009993 Digits in increasing order, A009995 Digits in decreasing order.
%K A119253 base,fini,full,nonn
%O A119253 1,2
%A A119253 _Zak Seidov_, May 10 2006