id:A090955 - OEIS Search Results

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Numbers in increasing order such that successive sum and difference both are primes. a(n)-a(n-1) and a(n)+a(n-1) both are primes.

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1, 4, 7, 10, 13, 16, 21, 26, 33, 38, 41, 48, 53, 56, 75, 82, 85, 88, 91, 102, 109, 114, 119, 122, 129, 134, 137, 140, 143, 150, 157, 160, 171, 176, 183, 190, 193, 196, 201, 208, 211, 222, 227, 230, 233, 246, 253, 256, 267, 274, 297, 302, 305, 308, 311, 330, 343 (list; graph; listen)

	OFFSET	`1,2`
	MATHEMATICA	`a = 1; Print[a]; Do[k = a + 1; While[ !(PrimeQ[k - a] && PrimeQ[k + a]), k++ ]; a = k; Print[a], {n, 1, 100}] (Propper)`
	CROSSREFS	`Cf. A090956.` `Sequence in context: A121381 A046956 A090852 this_sequence A137281 A134027 A087065` `Adjacent sequences: A090952 A090953 A090954 this_sequence A090956 A090957 A090958`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 31 2003`
	EXTENSIONS	`More terms from Ryan Propper (rpropper(AT)stanford.edu), Aug 27 2005`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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