id:A078178 - OEIS Search Results

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Least k>=2 such that n^k + n - 1 is prime.

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3

2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 4, 2, 16, 2, 2, 4, 3, 2, 2, 2, 7, 4, 2, 3, 2, 3, 2, 10, 2, 2, 108, 3, 6, 2, 3, 7, 2, 2, 4, 2, 16, 3, 2, 2, 2, 20, 2, 7, 2, 3, 3, 2, 2, 2, 2, 9, 4, 2, 2, 7, 8, 3, 2, 2, 2, 24, 2, 6, 2, 12, 4, 3, 8, 6, 2, 4, 3, 9, 194, 3, 13, 2, 8, 2, 2, 3, 8, 2, 10, 6, 4, 2, 2, 54, 2, 132, 4 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`n^a(n) + n - 1 = A078179(n).`
	EXAMPLE	`7^2+7-1=5*11, but 7^3+7-1=349=A000040(70), therefore a(7)=3.`
	CROSSREFS	`Cf. A076845, A078179.` `Sequence in context: A054990 A046921 A161966 this_sequence A105068 A120676 A125973` `Adjacent sequences: A078175 A078176 A078177 this_sequence A078179 A078180 A078181`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 20 2002`
	EXTENSIONS	`More terms from Benoit Cloitre, Nov 20 2002`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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