Variations on Euclid's formula for perfect numbers.
Firoozbakht, Farideh ; Hasler, Maximilian F.
Journal of Integer Sequences [electronic only], Tome 13 (2010), / Harvested from The Electronic Library of Mathematics
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Publié le : 2010-01-01
EUDML-ID : urn:eudml:doc:227188 
@article{05688331,
     title = {Variations on Euclid's formula for perfect numbers.},
     journal = {Journal of Integer Sequences [electronic only]},
     volume = {13},
     year = {2010},
     zbl = {1210.11009},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05688331}
}

Firoozbakht, Farideh; Hasler, Maximilian F. Variations on Euclid's formula for perfect numbers.. Journal of Integer Sequences [electronic only], Tome 13 (2010) . http://gdmltest.u-ga.fr/item/05688331/