id:A073653 - OEIS Search Results

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a(1)=3, a(2)=5; for n > 2, a(n) = smallest prime not included earlier such that a(n-2) + a(n-1) + a(n) is a prime.

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3, 5, 11, 7, 13, 17, 23, 19, 29, 31, 37, 41, 53, 43, 61, 47, 59, 67, 71, 73, 79, 89, 83, 97, 101, 109, 103, 137, 107, 139, 113, 127, 149, 157, 151, 131, 167, 163, 173, 211, 179, 181, 197, 191, 199, 223, 239, 229, 193, 251, 233, 277, 241, 269, 263, 307, 227, 293 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(3)=11 because 3+5+7=15 is composite and 3+5+11=19 is prime.`
	CROSSREFS	`Cf. A073654.` `Sequence in context: A046228 A132162 A154561 this_sequence A145398 A087322 A094747` `Adjacent sequences: A073650 A073651 A073652 this_sequence A073654 A073655 A073656`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 10 2002`
	EXTENSIONS	`More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 28 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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