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 A084515 #8 Jul 29 2017 13:03:08 %S A084515 0,1,3,6,9,12,16,20,24,28,32,36,40,44,48,52,56,60,64,69,74,79,84,89, %T A084515 94,99,104,109,114,119,124,129,134,139,144,149,154,159,164,169,174, %U A084515 179,184,189,194,199,204,209,214,219,224,229,234,239,244,249,254,259,264,269 %N A084515 Partial sums of A084516. %C A084515 For n>=1, (a(n-1)+1,a(n)) = (1,1),(2,3),(4,6),(7,9),(10,12),... gives the starting and ending offsets of the n-th site swap in the sequence A084511. Gives also the positions of 7s (ground states) in A084513. %H A084515 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %Y A084515 Differs from A084525 first time at the 18th term, where A084515(18) = 64, while A084525(18) = 65. %Y A084515 Cf. also A084505. %K A084515 nonn %O A084515 0,3 %A A084515 _Antti Karttunen_, Jun 02 2003