id:A144765 - OEIS Search Results

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Partial cototient function Phi(c, n) for c = 3: number of 3-semiprimes less than or equal and not coprime to n.

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0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 2, 0, 2, 1, 2, 0, 3, 0, 4, 2, 4, 0, 4, 1, 4, 3, 5, 0, 7, 0, 6, 4, 6, 3, 7, 0, 6, 4, 6, 0, 8, 0, 8, 7, 8, 0, 10, 2, 10, 6, 10, 0, 12, 5, 10, 6, 10, 0, 12, 0, 10, 8, 10, 5, 14, 0, 12, 8, 15, 0, 16, 0, 13, 12, 14, 6, 19, 0, 17, 10, 15, 0, 19, 7, 15, 10, 15, 0, 19, 6, 16 (list; graph; listen)

	OFFSET	`1,12`
	CROSSREFS	`Cf. A000010, A014612, A144741` `Sequence in context: A068067 A046926 A074398 this_sequence A147588 A070824 A071459` `Adjacent sequences: A144762 A144763 A144764 this_sequence A144766 A144767 A144768`
	KEYWORD	`easy,nonn`
	AUTHOR	`Reikku Kulon (reikku(AT)gmail.com), Sep 20 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research