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A069714
Least integer k such that (sigma(k)-k)/(k-phi(k)) = n.
2
2, 12, 1320, 851760
OFFSET
1,1
COMMENTS
10^11 < a(5) <= 124176229632000. - Donovan Johnson, Oct 22 2011
FORMULA
a(n) = Min{x: A001065(x) / A051953(x) = n}.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Labos Elemer, Apr 02 2002
STATUS
approved