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 A197756 #23 Aug 23 2012 17:38:11 %S A197756 1,2,3,4,6,5,8,10,7,12,14,11,16,18,9,20,22,24,13,26,28,30,32,15,34,36, %T A197756 101,38,40,42,44,46,17,48,50,52,54,56,58,19,60,62,64,66,103,68,70,72, %U A197756 74,76,78,80,21,82,84,86,88,90,92,94 %N A197756 The Yellow Comma sequence. %C A197756 Color in yellow the commas following an odd term. The number of digits between yellow commas is given by the sequence itself. This is a permutation of the natural numbers and the lexicographically earliest such sequence. %H A197756 Robert Price, <a href="/A197756/b197756.txt">Table of n, a(n) for n = 1..10000</a> %K A197756 nonn,base %O A197756 1,2 %A A197756 _N. J. A. Sloane_, Nov 29 2011, based on a posting to the Sequence Fans Mailing List by Eric Angelini, Nov 27 2011 %E A197756 a(28)-a(60) from _Robert Price_, Aug 22 2012