id:A118665 - OEIS Search Results

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Least prime p such that n*(p#^3)-1 is prime or 0 if n is a cube so no prime possible.

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2, 3, 2, 2, 5, 2, 3, 0, 2, 2, 59, 2, 2, 3, 11, 2, 3, 19, 2, 401, 2, 3, 3, 2, 2, 7, 0, 2, 3, 2, 13, 3, 2, 2, 3, 7, 7, 11, 2, 5, 5, 17, 7, 5, 2, 2, 2, 3, 2, 31, 3, 13, 257, 3, 2, 2, 5, 41, 2, 3, 2, 2, 31, 2, 0 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`1(2^3)-1=7 prime so a(1)=2` `2(2^3)-1=15 composite` `2((23)^3)-1=431 prime so a(2)=3`
	CROSSREFS	`Adjacent sequences: A118662 A118663 A118664 this_sequence A118666 A118667 A118668` `Sequence in context: A002307 A029247 A053269 this_sequence A027746 A128651 A093797`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierrecami(AT)tele2.fr), May 19 2006`

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Last modified October 13 17:46 EDT 2008. Contains 145008 sequences.

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