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 A084453 #9 Jul 29 2017 13:30:30 %S A084453 2,3,4,1,7,8,9,5,6,13,11,14,10,16,12,19,20,15,22,17,18,26,23,21,28,29, %T A084453 24,25,33,27,34,35,30,31,32,40,41,42,36,37,38,39,48,45,49,43,44,52,46, %U A084453 47,56,54,50,51,59,53,61,55,64,57,58,67,60,69,62,63,73,65,66,74,68,76 %N A084453 a(n) = n + A084452(n) - 3. %H A084453 A. Karttunen, <a href="/A084507/a084507.scm.txt">Scheme-program for computing this sequence</a> %H A084453 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A084453 Inverse: A084454. %Y A084453 Cf. A084455, A084459, A084489, A084493, A084497. %K A084453 nonn %O A084453 1,1 %A A084453 _Antti Karttunen_, Jun 02 2003