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 A169839 #11 Jan 20 2016 04:19:53 %S A169839 4,2,6,3,9,12,8,10,5,15,18,14,7,21,24,16,20,22,11,33,27,30,25,35,28, %T A169839 26,13,39,36,32,34,17,51,42,38,19,57,45,40,44,46,23,69,48,50,52,54,56, %U A169839 49,63,60,55,65,70,58,29,87,66,62,31,93,72,64,68,74,37,111,75,78,76,80,82,41 %N A169839 EKG sequence started at 4 instead of 2. %C A169839 Merges with A064413 after 3 steps. %H A169839 Peter Kagey, <a href="/A169839/b169839.txt">Table of n, a(n) for n = 1..10000</a> %Y A169839 For other initial terms, see A064413, A169837, A169841, A169843, A169845, A169847, A169849, A169851, A169853, A169855. %Y A169839 Cf. A169840. %K A169839 nonn %O A169839 1,1 %A A169839 _T. D. Noe_ and _N. J. A. Sloane_, Jun 02 2010