id:A162684 - OEIS Search Results

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a(1)=1. a(n) = the number of terms among (a(1),a(2),...a(n-1)) that either are coprime to n or divide n.

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1, 1, 2, 3, 4, 4, 6, 6, 6, 4, 10, 10, 12, 4, 8, 9, 16, 8, 18, 11, 14, 6, 22, 16, 22, 6, 19, 12, 28, 13, 30, 16, 20, 8, 28, 20, 36, 8, 27, 21, 40, 14, 42, 16, 26, 10, 46, 26, 42, 13, 35, 18, 52, 18, 44, 22, 39, 13, 58, 26, 60, 14, 39, 27, 49, 19, 66, 22, 45, 22, 70, 32, 72, 19, 42, 24 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`A162683` `Sequence in context: A064553 A126012 A096908 this_sequence A145340 A160680 A061984` `Adjacent sequences: A162681 A162682 A162683 this_sequence A162685 A162686 A162687`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jul 10 2009`
	EXTENSIONS	`More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Nov 03 2009`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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