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 A169757 #8 Sep 23 2015 06:35:34 %S A169757 3,4,5,7,8,9,10,12,14,14,14,17,19,19,20,22,25,25,23,28,29,29,29,32,36, %T A169757 35,33,36,40,40,40,42,46,46,46,49,49,48,44,56,57,56,51,57,61,60,59,62, %U A169757 68,68,62,67,71,70,68,71,78,78,73,74,80,82,81,82,87,87,93,84,96,87,88,96,100 %N A169757 First differences of A170907. %C A169757 a(314) = -59 is the first negative term. %C A169757 I wish I had a recurrence for this sequence! %H A169757 David Applegate, <a href="/A169757/b169757.txt">Table of n, a(n) for n = 0..870</a> %Y A169757 Cf. A170907, A169758. %K A169757 sign,look %O A169757 0,1 %A A169757 _N. J. A. Sloane_, May 06 2010