cp's OEIS Frontend

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.

A069714 Least integer k such that (sigma(k)-k)/(k-phi(k)) = n.

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%I A069714 #13 May 15 2024 19:21:38
%S A069714 2,12,1320,851760
%N A069714 Least integer k such that (sigma(k)-k)/(k-phi(k)) = n.
%C A069714 10^11 < a(5) <= 124176229632000. - _Donovan Johnson_, Oct 22 2011
%F A069714 a(n) = Min{x: A001065(x) / A051953(x) = n}.
%Y A069714 Cf. A068414, A068418, A001065, A051953, A000010, A000203.
%K A069714 more,nonn
%O A069714 1,1
%A A069714 _Labos Elemer_, Apr 02 2002