OFFSET
1,2
COMMENTS
Sequence of numbers from A145899.
EXAMPLE
a(6) = 168 because 168 is the smallest value of sigma(k) for n=6 positive integers k such that sigma(k) = 168 has solution; k = 60, 78, 92, 123, 143, 167.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Feb 03 2012
STATUS
approved