id:A124116 - OEIS Search Results

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a(n) the smallest positive integer such that a(n)+10^k is prime for k=1,2...n.

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1, 1, 9, 9, 559, 847, 15127, 54621, 54621, 5893321, 167459299 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n) == 0(mod 7) for n>5`
	EXAMPLE	`a(5)=559 because 569, 659, 1559, 10559 and 100559 are all prime`
	CROSSREFS	`Sequence in context: A121389 A065242 A050720 this_sequence A058200 A067450 A109409` `Adjacent sequences: A124113 A124114 A124115 this_sequence A124117 A124118 A124119`
	KEYWORD	`hard,nonn`
	AUTHOR	`Anton Vrba (antonvrba(AT)yahoo.com), Nov 28 2006`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.