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A088010 Solutions to sigma[x]-2x<=x^(1/3), and x is odd. Abundance-radius = Abs[sigma[n]-2n] does not exceed n^(1/3) and n is odd. +0
1
1, 315, 1155, 8415, 8925, 31815, 32445, 33705, 34335, 78975, 351351, 430815, 437745, 442365, 449295, 730125 (list; graph; listen)
OFFSET

1,2

MATHEMATICA

abu[x_] := Abs[DivisorSigma[1, x]-2*x] Do[If[ !Greater[abu[n], n^(1/3)//N]&&OddQ[n], Print[n]], {n, 1, 100000}]

CROSSREFS

Cf. A077374, A088007-A088012, A000396, A000079, A005100, A005101.

Sequence in context: A114807 A109130 A087415 this_sequence A048905 A115559 A033861

Adjacent sequences: A088007 A088008 A088009 this_sequence A088011 A088012 A088013

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Oct 20 2003

page 1

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.


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