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 A357004 #14 Jun 26 2023 22:31:46 %S A357004 1,2,3,4,5,5,7,8,9,10,11,9,11,11,15,16,17,17,19,17,19,19,23,17,19,19, %T A357004 23,19,23,23,31,32,33,34,35,36,37,37,39,34,37,42,43,37,45,43,47,33,35, %U A357004 37,39,37,43,45,47,35,39,43,47,39,47,47,63,64,65,65,67,65 %N A357004 Smallest k for which the cyclic Haar graphs with indices k and n are isomorphic. %C A357004 The fixed points are the terms of A137706. %C A357004 The number of fixed points n in the interval 2^(m-1) <= n < 2^m equals A357000(m). %H A357004 Pontus von Brömssen, <a href="/A357004/b357004.txt">Table of n, a(n) for n = 1..10000</a> %H A357004 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HaarGraph.html">Haar Graph</a> %F A357004 a(a(n)) = a(n). %F A357004 a(n) = A357005(n) for n <= 146, but a(147) = 141 < 147 = A357005(147). %F A357004 a(n) <= A357005(n) <= A163382(n). %Y A357004 Cf. A137706 (fixed points; or ordered list of distinct terms), A163382, A272919 (terms that occur only once), A357000, A357005. %K A357004 nonn %O A357004 1,2 %A A357004 _Pontus von Brömssen_, Sep 08 2022