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 A084497 #9 Jul 29 2017 13:30:52 %S A084497 1,3,2,5,6,4,9,7,8,12,11,10,14,15,16,13,18,20,19,17,23,21,24,22,27,26, %T A084497 28,25,31,32,29,30,35,36,34,33,40,37,38,39,44,41,43,42,48,46,45,47,52, %U A084497 50,51,49,56,55,53,54,60,59,58,57,62,64,65,61,63,67,70,66,69,68,72,75 %N A084497 a(n) = n + A084521(n) - 3. %H A084497 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084497 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A084497 Inverse: A084498. Cf. A084499, A084453, A084459, A084489, A084493. %K A084497 nonn %O A084497 1,2 %A A084497 _Antti Karttunen_, Jun 02 2003