A073484 - OEIS

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A073484

Number of gaps in factors of the n-th squarefree number.

0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 2, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 2, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 2, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,69`
	COMMENTS	`a(A000040(n))=0; a(A006094(n))=0; a(A002110(n))=0; a(A073485(n))=0; a(A073486(n))>0; a(A073487(n))=1; a(A073488(n))=2; a(A073489(n))=3;` `a(n)=0 iff A073483(n)=1.`
	EXAMPLE	`The 69th squarefree number is 110=2511, therefore a(69)=2, as there are two gaps: between 2 and 5 and between 5 and 11.`
	CROSSREFS	`Cf. A005117, A073483.` `Sequence in context: A121361 A191907 A052343 * A203947 A081396 A194293` `Adjacent sequences: A073481 A073482 A073483 * A073485 A073486 A073487`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 03 2002`

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Last modified February 14 14:47 EST 2012. Contains 205623 sequences.