A081221 - OEIS

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A081221

Number of consecutive numbers >= n having at least one square divisor > 1.

0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 2, 1, 0, 2, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 1, 0, 0, 3, 2, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 2, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 2, 1, 0, 0, 0, 2, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 3, 2, 1, 0, 0, 0, 1, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,8`
	COMMENTS	`mu(k)=0 for n<=k<n+a(n) and mu(n+a(n))<>0, where mu=A008683 (Moebius function); a(n)*mu(n)=0; a(A068781(n))>0.`
	CROSSREFS	`Sequence in context: A025435 A186714 A160382 * A103840 A066301 A046660` `Adjacent sequences: A081218 A081219 A081220 * A081222 A081223 A081224`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 10 2003`

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Last modified February 14 13:08 EST 2012. Contains 205623 sequences.