id:A153351 - OEIS Search Results

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Numbers n sch that 7n+2 is not prime

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1, 2, 4, 6, 7, 8, 9, 10, 12, 13, 14, 16, 17, 18, 19, 20, 22, 24, 25, 26, 28, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 48, 49, 50, 52, 54, 55, 56, 58, 59, 60, 61, 62, 64, 66, 67, 68, 69, 70, 72, 73, 74, 75, 76, 78, 79, 80, 82, 83, 84, 85, 86, 87, 88, 89, 90 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Of course n is even.`
	FORMULA	`Let p = prime number; n=(p^2-2)/7 mod.p); n=(p^2+6p-2)/7 mod (p); or, n=(p^2+8p-2)/7 mod (p);`
	CROSSREFS	`Cf. 105772` `Sequence in context: A147613 A155939 A114145 this_sequence A153343 A136499 A047513` `Adjacent sequences: A153348 A153349 A153350 this_sequence A153352 A153353 A153354`
	KEYWORD	`nonn`
	AUTHOR	`Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 24 2008`

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

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