id:A062721 - OEIS Search Results

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Numbers n such that n is a product of two primes and n-2 is prime.

+0
6

4, 9, 15, 21, 25, 33, 39, 49, 55, 69, 85, 91, 111, 115, 129, 133, 141, 159, 169, 183, 201, 213, 235, 253, 259, 265, 295, 309, 319, 339, 355, 361, 381, 391, 403, 411, 445, 451, 469, 481, 489, 493, 501, 505, 511, 543, 559, 565, 573, 579, 589, 633, 649, 655, 679 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 2, 1500 ], Plus @@ Last@Transpose@FactorInteger[ # ] == 2 && PrimeQ[ # - 2 ] & ]`
	CROSSREFS	`Cf. A006512, A001358, A043326.` `Cf. A063637, A046315, A089268.` `Sequence in context: A122927 A078505 A107986 this_sequence A104243 A099055 A103396` `Adjacent sequences: A062718 A062719 A062720 this_sequence A062722 A062723 A062724`
	KEYWORD	`nonn`
	AUTHOR	`Ahmed Fares (ahmedfares(AT)my-deja.com), Jul 14 2001`

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

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