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 A084459 #9 Jul 29 2017 13:30:38 %S A084459 2,3,6,1,7,11,4,5,9,14,8,16,10,20,12,13,21,15,26,17,18,19,27,33,22,23, %T A084459 24,25,30,37,28,29,39,31,32,44,34,35,36,46,38,52,40,41,42,43,53,45,60, %U A084459 47,48,49,50,51,57,65,54,55,56,68,58,59,74,61,62,63,64,76,66,67,83,69 %N A084459 a(n) = n + A084458(n) - 3. %H A084459 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084459 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A084459 Inverse: A084460. %Y A084459 Cf. A084461, A084453, A084489, A084493, A084497. %K A084459 nonn %O A084459 1,1 %A A084459 _Antti Karttunen_, Jun 02 2003