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A033882 Abundancy of the abundant or perfect numbers: m = sigma(n)-2n for n such that m >= 0. 0
0, 4, 3, 2, 12, 0, 12, 19, 10, 12, 28, 12, 8, 48, 12, 4, 51, 12, 26, 56, 4, 54, 60, 17, 12, 2, 64, 24, 12, 120, 60, 72, 12, 56, 115, 72, 80, 58, 39, 144, 12, 20, 186, 12, 124, 7, 72, 65, 96, 18, 156, 168, 64, 12, 56, 104 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..55.

MATHEMATICA

Select[Table[DivisorSigma[1, n]-2n, {n, 250}], #>=0&] (* Harvey P. Dale, Jan 22 2015 *)

CROSSREFS

Sequence in context: A105109 A227182 A065367 * A062111 A181596 A182142

Adjacent sequences:  A033879 A033880 A033881 * A033883 A033884 A033885

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified August 19 13:00 EDT 2017. Contains 290807 sequences.