id:A073085 - OEIS Search Results

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Numbers n such that 210*n+1 is prime.

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1, 2, 3, 5, 7, 11, 12, 13, 16, 17, 20, 22, 23, 28, 29, 30, 35, 36, 39, 42, 44, 46, 47, 50, 51, 53, 55, 57, 59, 60, 64, 67, 68, 72, 73, 74, 78, 81, 83, 85, 86, 88, 89, 93, 96, 100, 101, 104, 105, 111, 115, 117, 118, 121, 122, 124, 125, 128, 129, 135, 137, 139, 140, 141 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`1 is a member because 2101+1=211 is prime; 100 is a member because 210100+1=21001 is prime.`
	MATHEMATICA	`Flatten[Position[PrimeQ[210Range[100]+1], True]]`
	CROSSREFS	`Sequence in context: A137923 A131930 A001742 this_sequence A119251 A028835 A028834` `Adjacent sequences: A073082 A073083 A073084 this_sequence A073086 A073087 A073088`
	KEYWORD	`easy,nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 08 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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