id:A103104 - OEIS Search Results

Search: id:A103104

Displaying 1-1 of 1 results found.

page 1

Numbers n such that 9*10^n + 6*R_n + 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n.

+0
2

1, 2, 4, 7, 13, 28, 58, 86, 92, 108, 1408, 1486, 1712, 2674, 3880, 5536, 7588, 7650 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Also numbers n such that (29*10^n+1)/3 is prime.`
	LINKS	`Makoto Kamada, Factorizations of 966...667.` `Index entries for primes involving repunits.`
	MATHEMATICA	`Do[ If[ PrimeQ[(29*10^n + 1)/3], Print[n]], {n, 0, 10000}]`
	CROSSREFS	`Adjacent sequences: A103101 A103102 A103103 this_sequence A103105 A103106 A103107` `Sequence in context: A025246 A112740 A136408 this_sequence A103480 A024826 A102114`
	KEYWORD	`more,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jan 19 2005`

page 1

Search completed in 0.002 seconds

Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.