id:A046411 - OEIS Search Results

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Concatenation of prime factors of a(n) is a prime.

+0
10

6, 12, 18, 21, 22, 28, 33, 39, 46, 51, 52, 54, 58, 63, 66, 70, 82, 84, 93, 98, 111, 115, 117, 133, 141, 142, 148, 154, 159, 162, 165, 166, 171, 172, 175, 177, 182, 187, 198, 201, 205, 207, 210, 219, 220, 226, 232, 235, 237, 245, 246, 247, 249, 253, 255, 261 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`P. De Geest, Home Primes`
	EXAMPLE	`a(n)=162 and 162 = 2 * 3 * 3 * 3 * 3 so 23333 is a prime.`
	CROSSREFS	`Cf. A037271-A037281.` `Adjacent sequences: A046408 A046409 A046410 this_sequence A046412 A046413 A046414` `Sequence in context: A088723 A138939 A105935 this_sequence A037981 A044846 A037917`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jun 15 1998.`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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