id:A075609 - OEIS Search Results

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a(1) = 1, a(n) = smallest prime number not occurring earlier such that the concatenation a(n-1) and a(n) is a prime.

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1, 3, 7, 19, 13, 61, 31, 37, 67, 79, 103, 43, 73, 127, 139, 97, 151, 157, 109, 199, 181, 193, 163, 211, 229, 223, 241, 271, 277, 331, 283, 397, 337, 313, 307, 367, 457, 421, 349, 373, 379, 433, 439, 409, 463, 523, 487, 601, 541, 547, 499, 571, 673, 613, 577 (list; graph; listen)

	OFFSET	`1,2`
	CROSSREFS	`Cf. A075607, A075608, A075610.` `Sequence in context: A134045 A079898 A088629 this_sequence A083439 A032675 A089749` `Adjacent sequences: A075606 A075607 A075608 this_sequence A075610 A075611 A075612`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Sep 28 2002`
	EXTENSIONS	`More terms from Michel ten Voorde (seqfan(AT)tenvoorde.org) Jun 23 2003`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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