id:A037039 - OEIS Search Results

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Least k such that 4*n*k+1 is a prime.

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1, 2, 1, 1, 2, 3, 1, 3, 1, 1, 2, 2, 1, 2, 1, 3, 2, 1, 3, 3, 4, 1, 3, 1, 1, 3, 1, 1, 2, 2, 3, 2, 3, 1, 2, 3, 1, 3, 1, 4, 5, 2, 1, 2, 1, 7, 5, 1, 1, 2, 2, 6, 5, 2, 3, 2, 1, 1, 3, 1, 3, 6, 3, 1, 2, 5, 1, 5, 1, 1, 2, 2, 1, 2, 2, 4, 2, 1, 1, 2, 4, 7, 3, 1, 3, 3, 1, 1, 3, 5, 3, 9, 1, 3, 2, 2, 1, 8, 1, 1, 2, 1, 3, 3, 1 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(5)=2 because for n=5: 452+1=41 is a prime.`
	CROSSREFS	`Cf. A016014.` `Sequence in context: A097868 A025830 A083796 this_sequence A153452 A090680 A029254` `Adjacent sequences: A037036 A037037 A037038 this_sequence A037040 A037041 A037042`
	KEYWORD	`nonn`
	AUTHOR	`Felice Russo (felice.russo(AT)katamail.com)`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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