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 A162202 #6 Mar 11 2014 01:34:15 %S A162202 0,2,4,6,9,10,11,12,15,16,17,18,21,22,25,26,30,31,33,34,39,40,41,42, %T A162202 45,46,49,50,56,57,59,60,64,65,68,69,72,73,75,76,81,82,85,86,93,94,98, %U A162202 99,102,103,104,105,108,109,110,111,120,121,128,129,134,135 %N A162202 Number of the n-th vertex in the graph of the "mountain path" function for prime numbers. %C A162202 This sequence is formed by a zero together with the partial sums of the absolute values of A162203. %H A162202 Omar E. Pol, <a href="http://www.polprimos.com/imagenespub/polmpfpn.jpg"> Graph of the mountain path function for prime numbers</a> %H A162202 Omar E. Pol, <a href="http://www.polprimos.com/imagenespub/polmpca1.jpg"> Illustration: The mountain path of the primes</a> %Y A162202 Cf. A000040, A006005, A008578, A162200, A162201, A162203, A162340, A162341, A162342, A162343, A162344. %K A162202 easy,nonn %O A162202 0,2 %A A162202 _Omar E. Pol_, Jun 28 2009 %E A162202 Edited by _Omar E. Pol_, Jul 02 2009 %E A162202 More terms from _Nathaniel Johnston_, May 10 2011