id:A034809 - OEIS Search Results

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Concatenation of 'n and prevprime(n)' is a prime.

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4, 5, 9, 10, 16, 24, 33, 36, 42, 46, 51, 53, 56, 59, 63, 66, 67, 69, 75, 76, 78, 81, 87, 96, 102, 106, 108, 111, 114, 116, 123, 125, 129, 130, 135, 137, 144, 145, 147, 148, 153, 156, 159, 170, 171, 177, 179, 180, 184, 187, 190, 192, 195, 196, 198, 207, 211, 214 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`n=156 -> previous prime is 151 and '156151' is a prime.`
	CROSSREFS	`Cf. A034808-A034821.` `Sequence in context: A032381 A050036 A059582 this_sequence A096808 A067261 A001161` `Adjacent sequences: A034806 A034807 A034808 this_sequence A034810 A034811 A034812`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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