id:A070011 - OEIS Search Results

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Numbers n such that number of prime factors divided by the number of distinct prime factors is not an integer.

+0
6

12, 18, 20, 28, 44, 45, 48, 50, 52, 60, 63, 68, 72, 75, 76, 80, 84, 90, 92, 98, 99, 108, 112, 116, 117, 120, 124, 126, 132, 140, 147, 148, 150, 153, 156, 162, 164, 168, 171, 172, 175, 176, 180, 188, 192, 198, 200, 204, 207, 208, 212, 220, 228, 234, 236, 242 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`A001222(n)/A001221(n) (i.e. bigomega(n)/omega(n)) is not an integer.`
	EXAMPLE	`45 is a term because 45 = 3^2 * 5 gives bigomega(45)=3 and omega(45)=2 and 3/2 is not an integer.`
	PROGRAM	`(PARI) v=[]; for(n=2, 300, if(denominator(bigomega(n)/omega(n))<>1, v=concat(v, n))); v`
	CROSSREFS	`Cf. A067340 (complement), A070012 (floor(bigomega(n)/omega(n)).` `Different from A084679.` `Sequence in context: A124626 A087245 A030515 this_sequence A084679 A072588 A072357` `Adjacent sequences: A070008 A070009 A070010 this_sequence A070012 A070013 A070014`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 11 2002`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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