id:A015702 - OEIS Search Results

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Numbers n where phi(n) + sigma(n) increases.

+0
6

1, 2, 3, 4, 5, 6, 8, 10, 12, 16, 18, 20, 24, 30, 36, 40, 42, 48, 56, 60, 72, 84, 90, 96, 108, 120, 144, 168, 180, 210, 216, 240, 280, 288, 300, 324, 336, 360, 420, 480, 504, 540, 576, 600, 648, 660, 672, 720, 840, 960, 1008, 1080, 1200, 1260, 1440 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`R. K. Guy, Divisors and desires, Amer. Math. Monthly, 104 (1997), 359-360.`
	CROSSREFS	`Cf. A000203, A000010, A018892, A018894.` `Adjacent sequences: A015699 A015700 A015701 this_sequence A015703 A015704 A015705` `Sequence in context: A003044 A018541 A018293 this_sequence A029747 A095381 A141341`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified October 9 14:06 EDT 2008. Contains 144831 sequences.

AT&T Labs Research