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 A324873 #7 May 18 2019 16:54:41
%S A324873 1,2,1,4,1,2,1,8,3,2,1,4,1,2,1,16,1,6,1,4,1,2,1,8,5,2,9,4,1,2,1,32,3,
%T A324873 2,1,12,1,2,3,8,1,2,1,4,3,2,1,16,7,10,1,4,1,18,1,8,1,2,1,4,1,2,3,64,1,
%U A324873 6,1,4,3,2,1,24,1,2,5,4,1,6,1,16,27,2,1,4,1,2,1,8,1,6,1,4,1,2,5,32,1,14,9,20,1,2,1,8,1
%N A324873 a(n) = gcd(n, A060968(n)).
%H A324873 Antti Karttunen, <a href="/A324873/b324873.txt">Table of n, a(n) for n = 1..65537</a>
%F A324873 a(n) = gcd(n, A060968(n)).
%o A324873 (PARI)
%o A324873 A060968(n) = { my(f=factor(n)[, 1]); n*prod(i=if(n%2, 1, 2), #f, if(f[i]%4==1, 1-1/f[i], 1+1/f[i]))*if(n%4, 1, 2); }; \\ From A060968
%o A324873 A324873(n) = gcd(n,A060968(n));
%Y A324873 Cf. A060968, A235866 (positions of ones).
%K A324873 nonn
%O A324873 1,2
%A A324873 _Antti Karttunen_, May 18 2019