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 A295311 #9 Nov 23 2017 12:28:40 %S A295311 1,1,3,2,5,3,7,1,3,5,11,1,13,7,15,8,17,3,19,5,21,11,23,3,5,13,27,7,29, %T A295311 5,31,8,33,17,35,1,37,19,13,5,41,21,43,11,15,23,47,4,49,5,17,26,53,27, %U A295311 55,7,57,29,59,5,61,31,21,32,65,11,67,17,69,35,71,3,73,37,5,19,77,13,79,4,81,41,83,7,85,43,87,11,89,5 %N A295311 a(n) = n / A295310(n) = n / gcd(n, phi(sigma(n))). %H A295311 Antti Karttunen, <a href="/A295311/b295311.txt">Table of n, a(n) for n = 1..16384</a> %o A295311 (PARI) a(n) = n/gcd(n, eulerphi(sigma(n))); \\ _Michel Marcus_, Nov 23 2017 %Y A295311 Cf. A000010, A000203, A062401, A295301, A295310, A295312, A295314. %K A295311 nonn %O A295311 1,3 %A A295311 _Antti Karttunen_, Nov 22 2017