id:A162237 - OEIS Search Results

Search: id:A162237

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Primes p such that p^2+3*p+1 is not prime.

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11, 13, 17, 31, 41, 61, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 127, 131, 149, 151, 167, 181, 191, 193, 197, 199, 211, 223, 227, 233, 241, 251, 269, 271, 277, 281, 283, 307, 311, 317, 331, 337, 347, 367, 383, 389, 397, 401, 409, 421, 431, 433, 439, 443 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`For p=11,p^2+3p+1=155=531;p=13,p^2+3p+1=209=1119;p=17,p^2+3p+1=341=1131.`
	CROSSREFS	`Cf. A153590` `Sequence in context: A166009 A105892 A111337 this_sequence A090236 A032502 A167794` `Adjacent sequences: A162234 A162235 A162236 this_sequence A162238 A162239 A162240`
	KEYWORD	`nonn`
	AUTHOR	`Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jun 28 2009`

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

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