id:A032662 - OEIS Search Results

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Smallest n concatenated with n + d (d = 0,1,2,3,...) is a prime.

+0
2

1, 2, 1, 4, 3, 12, 1, 2, 1, 2, 3, 6, 1, 6, 3, 4, 5, 4, 5, 8, 7, 2, 21, 10, 17, 2, 1, 2, 3, 4, 1, 2, 7, 14, 3, 4, 1, 2, 1, 2, 11, 6, 5, 18, 3, 4, 3, 6, 1, 2, 1, 8, 5, 4, 7, 2, 1, 4, 5, 4, 11, 2, 1, 4, 3, 12, 1, 2, 9, 2, 3, 6, 1, 8, 9, 2, 3, 6, 1, 2, 1, 2, 5, 4, 929, 6, 3, 4, 5, 12, 1, 2, 1 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`First terms of sequences '1', A030457, A032617-A032624, continued with displacements d > 9.`
	EXAMPLE	`23th term = 21: 21 + 22 (=23-1) = 43: '21' and '43' = 2143 and this is a prime.`
	CROSSREFS	`Cf. A032663.` `Sequence in context: A028297 A114438 A109195 this_sequence A138509 A099331 A091879` `Adjacent sequences: A032659 A032660 A032661 this_sequence A032663 A032664 A032665`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.

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