id:A144764 - OEIS Search Results

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Partial totient function phi(c, n) for c = 3: number of 3-semiprimes less than and coprime to n.

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0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 3, 0, 2, 0, 4, 0, 3, 0, 2, 1, 6, 0, 7, 1, 3, 1, 4, 0, 7, 1, 3, 1, 7, 0, 8, 1, 3, 2, 10, 0, 8, 1, 5, 2, 12, 0, 7, 2, 6, 2, 12, 0, 12, 2, 5, 3, 8, 0, 14, 3, 7, 1, 16, 0, 16, 3, 5, 4, 12, 0, 19, 2, 9, 4, 19, 0, 12, 4, 9, 4, 19, 0, 13, 4, 10, 4, 13, 0, 20, 3 (list; graph; listen)

	OFFSET	`1,13`
	CROSSREFS	`Cf. A000010, A014612, A144740` `Cf. A036997 (phi(n) - max(phi(c, n)) over all nonnegative integers c)` `Sequence in context: A029881 A070090 A053473 this_sequence A084929 A054014 A158945` `Adjacent sequences: A144761 A144762 A144763 this_sequence A144765 A144766 A144767`
	KEYWORD	`easy,nonn`
	AUTHOR	`Reikku Kulon (reikku(AT)gmail.com), Sep 20 2008`

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Last modified December 5 08:23 EST 2009. Contains 170348 sequences.

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