id:A119570 - OEIS Search Results

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A119570

Primes p such that p^2-p-1 is not prime.

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2, 13, 19, 23, 37, 41, 43, 53, 59, 73, 79, 83, 89, 103, 107, 109, 113, 137, 151, 157, 163, 167, 173, 179, 191, 193, 199, 211, 223, 227, 229, 233, 239, 251, 257, 263, 271, 277, 281, 283, 293, 311, 313, 317, 337, 347, 349, 353, 367, 373, 383, 389, 401, 431, 433 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`A091567 Primes p such that p^2-p-1 IS prime. A091568 Primes of the form p^2-p-1, where p is prime.`
	MATHEMATICA	`Select[Prime[Range[250]], Not[PrimeQ[ #^2-#-1]]&]`
	CROSSREFS	`Cf. A091567, A091568.` `Sequence in context: A038943 A154812 A019343 this_sequence A018485 A097234 A122139` `Adjacent sequences: A119567 A119568 A119569 this_sequence A119571 A119572 A119573`
	KEYWORD	`nonn`
	AUTHOR	`Alexander Adamchuk (alex(AT)kolmogorov.com), Jul 27 2006`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

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