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 A339913 #5 Jan 01 2021 11:44:08
%S A339913 1,1,1,3,1,2,1,5,7,3,1,7,1,4,11,9,1,5,1,11,5,6,1,13,21,7,19,15,1,8,1,
%T A339913 17,23,9,29,19,1,10,9,21,1,11,1,23,31,12,1,25,43,13,35,27,1,14,9,29,
%U A339913 13,15,1,31,1,16,43,33,53,17,1,35,47,18,1,37,1,19,17,39,67,20,1,41,55,21,1,43,69,22,59,45,1,23
%N A339913 a(n) = x/gcd(n,x), where x = 1+A060681(n).
%H A339913 Antti Karttunen, <a href="/A339913/b339913.txt">Table of n, a(n) for n = 1..65537</a>
%F A339913 a(n) = (1+A060681(n)) / A323071(n).
%o A339913 (PARI)
%o A339913 A060681(n) = (n-if(1==n,n,n/vecmin(factor(n)[,1])));
%o A339913 A339913(n) = { my(x=1+A060681(n)); (x/gcd(n,x)); };
%Y A339913 Cf. A060681, A323071, A323072.
%K A339913 nonn
%O A339913 1,4
%A A339913 _Antti Karttunen_, Jan 01 2021