id:A111251 - OEIS Search Results

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Numbers n such that 3*n^2 + 3*n + 1 is prime.

+0
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1, 2, 3, 4, 6, 9, 10, 11, 13, 14, 17, 23, 24, 25, 27, 28, 30, 32, 34, 37, 38, 41, 42, 45, 48, 49, 52, 55, 58, 62, 63, 66, 67, 74, 80, 81, 86, 88, 90, 91, 93, 95, 105, 108, 119, 123, 125, 128, 129, 136, 140, 142, 147, 153, 156, 157, 158, 164, 165, 170, 171, 172, 175 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`If n=52 then 3n^2 + 3n + 1 = 8269 (prime).`
	PROGRAM	`(PARI) for(n=0, 250, if(isprime(3n^2+3n+1), print1(n, ", ")))`
	CROSSREFS	`Adjacent sequences: A111248 A111249 A111250 this_sequence A111252 A111253 A111254` `Sequence in context: A082976 A047419 A135205 this_sequence A047300 A026437 A026439`
	KEYWORD	`nonn`
	AUTHOR	`Parthasarathy Nambi (PachaNambi(AT)yahoo.com), Oct 31 2005`
	EXTENSIONS	`Extended by Lambert Klasen (lambert.klasen(AT)gmx.net), Nov 2 2005`

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Last modified October 15 09:18 EDT 2008. Contains 145015 sequences.

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