id:A107312 - OEIS Search Results

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Primes p such that p + 2 and p^2 + 2^2 are primes.

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3, 5, 17, 137, 347, 827, 2087, 2687, 3557, 3917, 4517, 4967, 5477, 5657, 5867, 6827, 7457, 7547, 7877, 8087, 8537, 8597, 10037, 10427, 10937, 12107, 12377, 13397, 13877, 16067, 17837, 17987, 19427, 19697, 20507, 20717, 20807, 22367, 22637 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Primes are lesser twins. Except a(1) and a(2), all a(n) == 7(mod 10).`
	MATHEMATICA	`Select[Prime[Range[3000]], PrimeQ[ #+2]&&PrimeQ[ #^2+4]&]`
	CROSSREFS	`Cf. A045637.` `Adjacent sequences: A107309 A107310 A107311 this_sequence A107313 A107314 A107315` `Sequence in context: A114161 A087858 A084723 this_sequence A083213 A056826 A058910`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), May 21 2005`

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Last modified October 8 07:34 EDT 2008. Contains 144666 sequences.

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