id:A034594 - OEIS Search Results

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Concatenation of nextprime(a(n)) and a(n) is a prime.

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3, 27, 33, 39, 47, 51, 53, 61, 63, 91, 111, 123, 129, 131, 143, 173, 189, 199, 211, 217, 219, 231, 233, 237, 257, 273, 279, 301, 319, 341, 353, 357, 417, 423, 429, 473, 481, 489, 493, 501, 519, 523, 529, 531, 537, 551, 561, 573, 579, 587, 597, 607, 609, 619 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`E.g. a(n)=27 -> nextprime(a(n)) is 29 so '2927' is a prime.`
	CROSSREFS	`See also A034591-A034596, A030459.` `Sequence in context: A010257 A121068 A136895 this_sequence A077533 A032418 A108163` `Adjacent sequences: A034591 A034592 A034593 this_sequence A034595 A034596 A034597`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.`

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Last modified December 4 14:15 EST 2008. Contains 151279 sequences.

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