id:A070689 - OEIS Search Results

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Numbers n such that n+1 and n^2+1 are primes.

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2

1, 2, 4, 6, 10, 16, 36, 40, 66, 126, 130, 150, 156, 180, 210, 240, 250, 256, 270, 280, 306, 396, 400, 420, 430, 466, 490, 556, 570, 576, 646, 690, 700, 750, 760, 826, 906, 910, 936, 946, 966, 1060, 1096, 1150, 1276, 1290, 1306, 1320, 1366, 1566, 1570 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`Select[ Range[2000], PrimeQ[ # + 1] && PrimeQ[ #^2 + 1] & ]`
	CROSSREFS	`Cf. A067720.` `Sequence in context: A059749 A164142 A048833 this_sequence A091611 A107742 A158510` `Adjacent sequences: A070686 A070687 A070688 this_sequence A070690 A070691 A070692`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), May 13 2002`

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

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