id:A087618 - OEIS Search Results

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a(n) is the number of pair of consecutive numbers (k,k+1) with k<=10^n such that k and k+1 are both squarefree.

+0
5

1, 5, 33, 323, 3230, 32269, 322619, 3226343, 32263377, 322634281, 3226340896 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`Eric Weisstein's World of Mathematics, Squarefree`
	FORMULA	`Asymptotic density is A065474.`
	CROSSREFS	`Cf. A071172, A065474.` `Sequence in context: A001828 A084845 A098460 this_sequence A134152 A140424 A145505` `Adjacent sequences: A087615 A087616 A087617 this_sequence A087619 A087620 A087621`
	KEYWORD	`nonn,more`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Sep 19, 2003`

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Last modified November 22 20:51 EST 2009. Contains 167312 sequences.