id:A052089 - OEIS Search Results

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A052089

Primes formed by concatenating n with n-1.

+0
11

43, 109, 2221, 2423, 3433, 4241, 5857, 7069, 7877, 8887, 10099, 102101, 108107, 112111, 114113, 124123, 148147, 154153, 160159, 172171, 180179, 192191, 198197, 202201, 208207, 210209, 214213, 238237, 244243, 262261, 264263, 268267, 270269 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`2423 is a prime and a concatenation of 24 and 23.`
	CROSSREFS	`Cf. A030458, A052087, A052088.` `Adjacent sequences: A052086 A052087 A052088 this_sequence A052090 A052091 A052092` `Sequence in context: A115586 A001133 A068699 this_sequence A039471 A104783 A029816`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jan 15 2000.`

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Last modified May 11 10:28 EDT 2008. Contains 139662 sequences.

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