id:A032694 - OEIS Search Results

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Only 4 digits from (1,2,3,4,5,6,7,8,9) can precede a(n) to form a prime.

+0
1

11, 19, 27, 31, 41, 47, 53, 67, 73, 87, 91, 97, 109, 129, 151, 153, 187, 203, 209, 217, 231, 243, 273, 283, 311, 323, 373, 389, 423, 433, 447, 451, 467, 481, 539, 549, 581, 583, 591, 607, 621, 623, 637, 643, 657, 659, 663, 669, 673, 677, 691, 693, 699, 753 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`If a(n) = 109 then we find '1'109, '3'109, '7'109 and '9'109 to be primes.`
	CROSSREFS	`Adjacent sequences: A032691 A032692 A032693 this_sequence A032695 A032696 A032697` `Sequence in context: A089172 A029481 A129916 this_sequence A004769 A125771 A057538`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

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