id:A153343 - OEIS Search Results

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Numbers n such that 5n+4 is not prime

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	OFFSET	`1,2`
	COMMENT	`Of course n is even`
	FORMULA	`Let p = prime number; n=(p^2-4)/5 mod (p); n=(p^2+2p-4)/5 mod (p); n=(p^2+8p-4)/5 mod (p)`
	CROSSREFS	`Cf. A024897` `Sequence in context: A155939 A114145 A153351 this_sequence A136499 A047513 A039068` `Adjacent sequences: A153340 A153341 A153342 this_sequence A153344 A153345 A153346`
	KEYWORD	`nonn`
	AUTHOR	`Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Dec 24 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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