id:A057015 - OEIS Search Results

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Numbers n such that n^2 + 1, n^2 + 3, n^2 + 7 and n^2 + 9 are all primes.

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4

2, 10, 1420, 2080, 2600, 20500, 22630, 46960, 65300, 81610, 153560, 173590, 187330, 195290, 238850, 255230, 301690, 315410, 316250, 346580, 395860, 398710, 439750, 496220, 498550, 506360, 555110, 609400, 618580, 872950, 927070 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 2, 10^6, 2 ], PrimeQ[ #^2 + 1 ] && PrimeQ[ #^2 + 3 ] && PrimeQ[ #^2 + 7 ] && PrimeQ[ #^2 + 9 ] & ]`
	CROSSREFS	`Sequence in context: A137890 A074333 A008559 this_sequence A059732 A000884 A007158` `Adjacent sequences: A057012 A057013 A057014 this_sequence A057016 A057017 A057018`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 09 2000`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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