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Search: id:A007539
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| A007539 |
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First n-fold perfect number.
(Formerly M4297)
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+0
9
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| 1, 6, 120, 30240, 14182439040, 154345556085770649600, 141310897947438348259849402738485523264343544818565120000, 8268099687077761372899241948635962893501943883292455548843932421413884476391773708366277840568053624227289196057256213348352000000000
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, p. 22.
A. Brousseau, Number Theory Tables. Fibonacci Association, San Jose, CA, 1973, p. 138.
R. K. Guy, Unsolved Problems in Number Theory, B2.
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LINKS
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C. K. Caldwell, The Prime Glossary, multiply perfect
Achim Flammenkamp, The Multiply Perfect Numbers Page
Fred Helenius, Link to Glossary and Lists
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CROSSREFS
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Cf. A000396, A005820, A027687, A046060, A046061.
Cf. A007691, A072002.
Sequence in context: A012475 A053777 A023199 this_sequence A040996 A110442 A137149
Adjacent sequences: A007536 A007537 A007538 this_sequence A007540 A007541 A007542
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KEYWORD
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nonn,nice
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AUTHOR
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njas
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EXTENSIONS
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More terms sent by Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 30 2000
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