id:A015708 - OEIS Search Results

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Numbers n such that n | (phi(n) * sigma(n)) but (phi(n) + sigma(n))/n does not increase.

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1, 84, 120, 162, 234, 252, 270, 486, 540, 588, 648, 672, 819, 936, 1350, 1458, 1536, 1550, 1638, 1764, 1782, 1800, 1872, 1920, 2268, 2325, 3000, 3042, 3240, 3276, 3402, 3564, 3724, 3780, 4116, 4374, 4464, 4650, 4680, 4704, 5292, 5376 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`R. K. Guy, Divisors and desires, Amer. Math. Monthly, 104 (1997), 359-360.`
	CROSSREFS	`Sequence in context: A045569 A113931 A111313 this_sequence A114822 A099637 A101260` `Adjacent sequences: A015705 A015706 A015707 this_sequence A015709 A015710 A015711`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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