id:A071809 - OEIS Search Results

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Smallest s such that sk-1 is square-free for 1 <= k <= n.

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2, 2, 2, 2, 4, 4, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 12, 12, 24, 120, 120, 120, 120, 120, 150, 150, 150, 150, 240, 240, 240, 240, 240, 240, 300, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840, 840 (list; graph; listen)

	OFFSET	`1,1`
	PROGRAM	`(PARI) for(n=1, 57, s=1; while(sum(i=1, n, issquarefree(s*i-1))<n, s++); print1(s, ", "))`
	CROSSREFS	`Sequence in context: A035398 A104409 A032576 this_sequence A104976 A010334 A010578` `Adjacent sequences: A071806 A071807 A071808 this_sequence A071810 A071811 A071812`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 06 2002`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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