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Search: id:A015707
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A015707 (phi(n) + sigma(n))/n increases. +0
1
6, 18, 24, 28, 40, 54, 72, 96, 117, 135, 196, 200, 216, 224, 288, 360, 384, 468, 496, 600, 640, 756, 775, 864, 891, 1000, 1080, 1152, 1372, 1488, 1521, 1568, 1701, 1792, 1944, 2016, 2160, 2176, 2480, 2592, 3100, 3159, 3200, 3375, 3456 (list; graph; listen)
OFFSET

0,1

REFERENCES

R. K. Guy, Divisors and desires, Amer. Math. Monthly, 104 (1997), 359-360.

CROSSREFS

Adjacent sequences: A015704 A015705 A015706 this_sequence A015708 A015709 A015710

Sequence in context: A022418 A081318 A011775 this_sequence A101527 A028887 A051395

KEYWORD

nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com)

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Last modified October 10 20:39 EDT 2008. Contains 144831 sequences.


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