id:A076144 - OEIS Search Results

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Largest square-free m <= sfn(n) such that m*sfn(n) is also square-free, where sfn(n) is the n-th square-free number.

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	OFFSET	`1,3`
	COMMENT	`gcd(a(n),spf(n))=1;` `a(n+1)=sfn(n) for n<106, but a(107)=173=sfn(105), as sfn(107)sfn(106)=177174=(359)(2329) is not square-free.`
	CROSSREFS	`a(i+1) = A005117(i) only for 1<=i<106. Cf. A077395.` `Adjacent sequences: A076141 A076142 A076143 this_sequence A076145 A076146 A076147` `Sequence in context: A122144 A064052 A064594 this_sequence A005117 A077377 A076786`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 30 2002`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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