id:A068998 - OEIS Search Results

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Numbers n such that the concatenation of the prime factors of n (in increasing order) is prime.

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2, 3, 5, 6, 7, 8, 9, 11, 12, 13, 16, 17, 18, 19, 21, 22, 23, 24, 25, 27, 29, 31, 32, 33, 36, 37, 39, 41, 43, 44, 46, 47, 48, 49, 51, 53, 54 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`The prime factors of 51 are 3 and 17, and their concatenation 317 is prime, so 51 belongs to the sequence.`
	CROSSREFS	`Sequence in context: A039194 A099354 A039115 this_sequence A095274 A079111 A007989` `Adjacent sequences: A068995 A068996 A068997 this_sequence A068999 A069000 A069001`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Mar 16 2002`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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