id:A064975 - OEIS Search Results

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Numbers n such that n*10-1, n*10-3, n*10-7 and n*10-9 are all prime.

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2, 11, 20, 83, 149, 188, 209, 326, 347, 566, 944, 1301, 1565, 1574, 1607, 1805, 1892, 1943, 2102, 2228, 2531, 3173, 3485, 4379, 5135, 5534, 6299, 6722, 6950, 7223, 7727, 7970, 8105, 8273, 8882, 9785, 9914, 10112, 10985, 11654, 11930, 12221, 13547 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[Range[10^5], PrimeQ[10# - 1] && PrimeQ[10# - 3] && PrimeQ[10# - 7] && PrimeQ[10# - 9] &]`
	CROSSREFS	`Sequence in context: A017185 A092595 A116990 this_sequence A115095 A061907 A052216` `Adjacent sequences: A064972 A064973 A064974 this_sequence A064976 A064977 A064978`
	KEYWORD	`easy,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Oct 30 2001`

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

AT&T Labs Research