id:A070915 - OEIS Search Results

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Numbers having at most two distinct prime factors.

+0
2

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 67, 68, 69, 71 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`88 and 77 are terms, as 88=112^3 and 77=117, but 66 is not a term, as 66 = 1132.`
	CROSSREFS	`A000040, A000961, A006681, and A003586 are subsequences.` `Cf. A001221(a(n)) <= 2, A007774.` `Sequence in context: A032513 A048266 A123068 this_sequence A004441 A004438 A109425` `Adjacent sequences: A070912 A070913 A070914 this_sequence A070916 A070917 A070918`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 20 2002`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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