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 A169857 #11 May 16 2019 01:32:32 %S A169857 0,44,3,44,44,44,8,44,44,48,44,44,44,18,17,58,18,51,18,44,48,62,48,44, %T A169857 47,44,48,82,48,90,31,48,65,44,48,101,71,47,48,116,48,129,41,39,87, %U A169857 135,48,65,46,65,47,148,48,104,58,71,105,168,104,187,121,69,64,69 %N A169857 Consider the EKG sequence (A064413) started at n instead of 2; a(n) = number of steps before sequence merges with A064413, or 0 if the two sequences never merge. %C A169857 For the purpose of this sequence, ignore the initial 1 in A064413 and imagine that it begins with the 2. %C A169857 The upper points appear to occur at primes, the points just below the upper points at twice primes. %C A169857 Are there any zeros? %H A169857 T. D. Noe, <a href="/A169857/b169857.txt">Table of n, a(n) for n=2..3000</a> %H A169857 Gordon Hamilton, <a href="http://www.youtube.com/watch?v=yd2jr30K2R4">The EKG Sequence and the Tree of Numbers</a> %H A169857 Gordon Hamilton, <a href="http://m.youtube.com/watch?v=Y2KhEW9CSOA">Untitled video related to previous video</a> %Y A169857 Cf. A064413, A064421, A169837-A169856, A119415. %K A169857 nonn %O A169857 2,2 %A A169857 _T. D. Noe_ and _N. J. A. Sloane_, Jun 02 2010