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%I #9 Mar 08 2024 01:13:43
%S 1,4,56,99,238,3276,26820,55167,550514,3842258,16222973,56731455,
%T 118396264,396379039896,9772829297132,15876697439182,2710103706735457,
%U 4438313663247000,12136546505785858,3518811208764622050
%N Numbers m = sum_(k=1...n) sigma(k) such that sum_(k=1...n) sigma(k) / k is integer for any k.
%C Numbers m = A024916(k) such that A024916(k) / k is integer for any k. If a(14) exists it must be bigger than 8*10^9.
%C Corresponding values of k, and sum_(k=1...n) sigma(k)/k are given in A056550 and A168132. [From _Jaroslav Krizek_, Nov 21 2009]
%H Donovan Johnson, <a href="/A168133/b168133.txt">Table of n, a(n) for n = 1..25</a>
%e Number a(3) = 56 = A024916(8) is in sequence because A024916(8) / 8 = 56 / 8 = 7 is integer for k = 8.
%K nonn
%O 1,2
%A _Jaroslav Krizek_, Nov 18 2009, Dec 04 2009
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