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 A063513 #14 Aug 24 2019 12:28:56
%S A063513 3,2,56,12,2580,630,416640,291060,1719277560,587133466920,33044291280
%N A063513 Least balanced numbers (A020492): m such that the quotient sigma(m)/phi(m) equals the n-th prime.
%F A063513 a(n) = Min{x : A000203(x)/A000010(x) = p(n)} = Min{x : A023897(x) = p(n)}
%e A063513 n=7: p(7) = 17. a(7) = 416640 = 2^7*3*5*7*31. sigma(416640) = 1566720 = 17*phi(a(7)). phi(416640) = 92160.
%Y A063513 Cf. A055234 (smallest x such that sigma(x) = n*phi(x)), A000203, A000010, A020492, A023897.
%K A063513 nonn,more
%O A063513 1,1
%A A063513 _Labos Elemer_, Jul 31 2001
%E A063513 More terms from _Robert G. Wilson v_, Aug 09 2001
%E A063513 a(10)-a(11) (from A055234) added by _Donovan Johnson_, Feb 03 2012