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 A168133 #21 Jan 14 2025 14:57:55
%S A168133 1,4,56,99,238,3276,26820,55167,550514,3842258,16222973,56731455,
%T A168133 118396264,396379039896,9772829297132,15876697439182,2710103706735457,
%U A168133 4438313663247000,12136546505785858,3518811208764622050
%N A168133 Numbers m = Sum_{k=1..n} sigma(k) such that Sum_{k=1..n} sigma(k) is divisible by k.
%C A168133 Numbers m = A024916(k) such that A024916(k) / k is an integer. If a(14) exists it must be bigger than 8*10^9.
%C A168133 Corresponding values of k, and sum_(k=1...n) sigma(k)/k are given in A056550 and A168132. - _Jaroslav Krizek_, Nov 21 2009
%H A168133 Donovan Johnson, <a href="/A168133/b168133.txt">Table of n, a(n) for n = 1..25</a>
%e A168133 Number a(3) = 56 = A024916(8) is in sequence because A024916(8) / 8 = 56 / 8 = 7 is an integer for k = 8.
%Y A168133 Cf. A024916, A056550, A168132.
%K A168133 nonn
%O A168133 1,2
%A A168133 _Jaroslav Krizek_, Nov 18 2009, Dec 04 2009