id:A032692 - OEIS Search Results

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

+0
1

17, 117, 119, 123, 131, 143, 147, 157, 159, 173, 177, 191, 193, 197, 199, 201, 207, 227, 233, 239, 241, 247, 251, 261, 263, 279, 289, 291, 299, 303, 317, 321, 327, 331, 339, 341, 353, 357, 359, 363, 367, 369, 387, 407, 409, 411, 427, 429, 439, 443, 469 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`If a(n) = 469 then we find '3'469 and '6'469 to be primes.`
	CROSSREFS	`Sequence in context: A070144 A070209 A070136 this_sequence A044349 A044730 A086020` `Adjacent sequences: A032689 A032690 A032691 this_sequence A032693 A032694 A032695`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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Last modified December 4 12:27 EST 2008. Contains 151280 sequences.

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