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 A072620 #6 May 01 2014 02:47:42 %S A072620 0,1,2,3,4,5,10,7,8,9,6,11,12,13,14,16,28,33,29,19,30,21,22,23,20,25, %T A072620 26,27,15,37,24,31,38,17,34,35,36,18,32,39,40,41,42,44,47,49,48,84, %U A072620 112,98,103,99,85,107,87,88,56,70,89,100,90,61,91,63,64,65,62,67,68,69,57 %N A072620 Permutation of natural numbers obtained from the permutation A072089 (zero-based). %C A072620 See the comment at A072088. %H A072620 A. Karttunen, <a href="/A072620/b072620.txt">Table of n, a(n) for n = 0..1429</a> %H A072620 A. Karttunen, <a href="http://www.iki.fi/~kartturi/matikka/Nekomorphisms/gatomorf.htm">Gatomorphisms</a> (Includes the complete Scheme program for computing this sequence) %H A072620 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A072620 Compare to the plot of A070041. %Y A072620 A072620(n) = A072622(n+1)-1. Inverse permutation: A072619. Cf. also A072089, A070041. %K A072620 nonn %O A072620 0,3 %A A072620 _Antti Karttunen_, Jun 25 2002