OFFSET
1,1
COMMENTS
a(9) > 10^10. - Donovan Johnson, Nov 15 2012
FORMULA
Numbers n such that (sigma(n)-n)/(tau(n)-1) is a perfect number.
CROSSREFS
KEYWORD
nonn
AUTHOR
Zdenek Cervenka, Nov 15 2012
EXTENSIONS
a(6)-a(8) from Donovan Johnson, Nov 15 2012
STATUS
approved