1,2
Numbers m = A024916(k) such that A024916(k) / A000203(k) is integer for any k.
Corresponding values of k, sigma (k), and sum_(k=1...n) sigma(k)/sigma(k) are given in A168127, A168129, and A168128. [From Jaroslav Krizek, Nov 21 2009]
Table of n, a(n) for n=1..7.
Number a(3) = 690 = A024916(29) is in sequence because A024916(29) / A000203(29) = 690 / 30 = 23 is integer for k = 29.
Sequence in context: A128875 A199801 A202910 * A037076 A116245 A221198
Adjacent sequences: A168127 A168128 A168129 * A168131 A168132 A168133
nonn
Jaroslav Krizek, Nov 18 2009, Dec 04 2009
approved
