id:A112530 - OEIS Search Results

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Numbers n such that prime(n) +/- n and prime(n) +/- 2n are all primes.

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4

720, 1920, 5580, 14370, 17160, 21090, 26040, 28560, 38280, 43680, 43890, 50730, 60090, 77850, 100800, 104760, 120060, 125190, 155100, 167850, 171780, 193260, 202470, 206460, 211860, 217830, 221880, 224070, 249900, 249990, 252420, 261960 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`All entries are divisible by 30(?). Union of A064403 and A112529; A064403: Prime(n) +/- n are both primes, A112529: Prime(n) +/- 2n are both primes,`
	MATHEMATICA	`Select[Range[720, 2000000, 10], PrimeQ[Prime[ # ]+# ]&&PrimeQ[Prime[ # ]-# ]&&PrimeQ[Prime[ # ]+2# ]&&PrimeQ[Prime[ # ]-2# ]&]`
	CROSSREFS	`Cf. A064403, A112529.` `Adjacent sequences: A112527 A112528 A112529 this_sequence A112531 A112532 A112533` `Sequence in context: A131663 A090392 A000805 this_sequence A052800 A052794 A096933`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 10 2005`

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.

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