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 A209922 #16 Mar 19 2016 11:12:15 %S A209922 5,10,13,15,17,20,26,29,30,34,35,37,39,40,41,45,51,52,53,55,58,60,61, %T A209922 68,70,73,74,78,80,82,87,89,90,91,95,97,101,102,104,105,106,109,110, %U A209922 111,113,115,116,117,119,120,122,123,125,135,136,137,140,143,146,148,149 %N A209922 Position of negative values in A209661 and A209662. %C A209922 Absolute values of the negative terms of A209662. Sequence related to an infinite series which is equal to pi, due to Leonhard Euler. %H A209922 Ray Chandler, <a href="/A209922/b209922.txt">Table of n, a(n) for n = 1..10000</a> %Y A209922 Complement of A209921. %Y A209922 Cf. A000796, A209661, A209662. %K A209922 nonn %O A209922 1,1 %A A209922 _Omar E. Pol_, Mar 15 2012 %E A209922 34, 105, 115 inserted by _Ray Chandler_, Mar 19 2016