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 A335300 #9 Jun 02 2020 14:10:02 %S A335300 0,1,4,2,71,73,3,5,16,14,12,10,8,6,31,29,27,25,23,438,7,9,11,13,15,17, %T A335300 59,57,520,410,56,54,52,50,48,46,44,42,40,38,692,22,20,18,28,30,32,97, %U A335300 424,234,96,94,92,90,88,86,240,4518,296,294,464,462,19,21 %N A335300 a(n) is the least k such that A335299(k) = n, or -1 if no such k exists. %H A335300 Rémy Sigrist, <a href="/A335300/b335300.txt">Table of n, a(n) for n = 0..10000</a> %H A335300 Rémy Sigrist, <a href="/A335300/a335300.png">Logarithmic scatterplot of the sequence for n = 0..1000000</a> %H A335300 Rémy Sigrist, <a href="/A335300/a335300.txt">C++ program for A335300</a> %H A335300 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %o A335300 (C++) See Links section. %Y A335300 Cf. A005132, A057167, A335299. %K A335300 nonn %O A335300 0,3 %A A335300 _Rémy Sigrist_, May 31 2020