id:A100330 - OEIS Search Results

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Positive integers n such that n^6+n^5+n^4+n^3+n^2+n+1 is prime.

+0
2

1, 2, 3, 5, 6, 13, 14, 17, 26, 31, 38, 40, 46, 56, 60, 61, 66, 68, 72, 73, 80, 87, 89, 93, 95, 115, 122, 126, 128, 146, 149, 156, 158, 160, 163, 180, 186, 192, 203, 206, 208, 220, 221, 235, 237, 238, 251, 264, 266, 280, 282, 290, 294, 300, 303, 320, 341, 349, 350 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`2 is in the sequence because 2^6+2^5+2^4+2^3+2^2+2+1 = 127 which is prime.`
	MATHEMATICA	`Select[Range[350], PrimeQ[Sum[ #^i, {i, 0, 6}]] &] (Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 17 2004)`
	CROSSREFS	`Cf. A100331.` `Sequence in context: A098930 A075372 A064725 this_sequence A020473 A098833 A075371` `Adjacent sequences: A100327 A100328 A100329 this_sequence A100331 A100332 A100333`
	KEYWORD	`nonn`
	AUTHOR	`Ray G. Opao (1260(AT)email.com), Nov 16 2004`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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