id:A034592 - OEIS Search Results

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Cycle of 2 steps possible for 'concatenate a(n) and nextprime(a(n)) is a prime'.

+0
3

0, 36, 150, 284, 464, 467, 525, 584, 644, 777, 855, 941, 1058, 1120, 1179, 1362, 1788, 1855, 2368, 2520, 2547, 2550, 2576, 2743, 2988, 3063, 3273, 3339, 3410, 3930, 4054, 4370, 4739, 4843, 4910, 5253, 5445, 5550, 5671, 5967, 6512, 6721, 6987, 7131, 7216 (list; graph; listen)

	OFFSET	`0,2`
	EXAMPLE	`E.g. a(n)=777 -> nextprime(a(n)) is 787 so '777787' is prime (=step 1); a(n2)=777787 -> nextprime(a(n2)) is 777817 so '777787777817' is prime (=step 2).`
	CROSSREFS	`See also A034591-A034596, A030459.` `Sequence in context: A076432 A003848 A039495 this_sequence A160754 A117511 A064244` `Adjacent sequences: A034589 A034590 A034591 this_sequence A034593 A034594 A034595`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Oct 15 1998.`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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