id:A034591 - OEIS Search Results

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Numbers n such that concatenation of n and nextprime(n) is a prime.

+0
6

0, 2, 6, 8, 9, 12, 27, 31, 36, 42, 44, 45, 51, 56, 63, 68, 69, 78, 83, 86, 93, 94, 96, 98, 102, 104, 105, 108, 115, 117, 118, 123, 126, 132, 138, 150, 151, 154, 156, 157, 160, 167, 176, 180, 183, 186, 192, 194, 195, 199, 201, 205, 213, 217, 219, 225, 230, 233 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`E.g. a(n)=8 -> nextprime(a(n)) is 11 so '811' is prime.`
	CROSSREFS	`See also A034592-A034596, A030459.` `Sequence in context: A023714 A096507 A050675 this_sequence A047278 A107737 A045138` `Adjacent sequences: A034588 A034589 A034590 this_sequence A034592 A034593 A034594`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.`

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Last modified November 23 10:40 EST 2009. Contains 167421 sequences.

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