id:A010848 - OEIS Search Results

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Number of numbers k <= n such that at least one prime factor of n is not a prime factor of k.

+0
1

0, 1, 2, 2, 4, 5, 6, 4, 6, 9, 10, 10, 12, 13, 14, 8, 16, 15, 18, 18, 20, 21, 22, 20, 20, 25, 18, 26, 28, 29, 30, 16, 32, 33, 34, 30, 36, 37, 38, 36, 40, 41, 42, 42, 42, 45, 46, 40, 42, 45, 50, 50, 52, 45, 54, 52, 56, 57, 58, 58, 60, 61, 60, 32, 64, 65, 66, 66, 68, 69, 70, 60 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`a(n) = n-A003557(n). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 15 2006`
	CROSSREFS	`Cf. A008479, A010846, A010847.` `Sequence in context: A121600 A126870 A137413 this_sequence A133937 A130498 A064574` `Adjacent sequences: A010845 A010846 A010847 this_sequence A010849 A010850 A010851`
	KEYWORD	`nonn,easy`
	AUTHOR	`Olivier Gerard (ogerard(AT)ext.jussieu.fr)`
	EXTENSIONS	`Definition corrected by Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 15 2006`

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Last modified September 6 09:40 EDT 2008. Contains 143480 sequences.

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