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A125496
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Deficient cubes.
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0
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1, 8, 27, 64, 125, 343, 512, 729, 1331, 2197, 3375, 4096, 4913, 6859, 9261, 12167, 15625, 19683, 24389, 29791, 32768, 35937, 39304, 42875, 50653, 54872, 59319, 68921, 79507, 91125, 97336, 103823, 117649, 132651, 148877, 166375, 185193
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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MAPLE
| with(numtheory): a:=proc(n) if sigma(n^3)<2*n^3 then n^3 else fi end: seq(a(n), n=1..70); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 10 2007
isA005100 := proc(n) if numtheory[sigma](n) < 2*n then RETURN(true) ; else RETURN(false) ; fi ; end : for n from 1 to 100 do if isA005100(n^3) then printf("%d, ", n^3) ; fi ; od ; - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 12 2007
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CROSSREFS
| Intersection of A005100 (deficient numbers) and A000578 (cubes).
Sequence in context: A125084 A052048 A052064 * A030289 A111131 A111103
Adjacent sequences: A125493 A125494 A125495 * A125497 A125498 A125499
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KEYWORD
| nonn
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AUTHOR
| Tanya Khovanova (tanyakh(AT)yahoo.com), Dec 27 2006
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EXTENSIONS
| More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 10 2007
More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 12 2007
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