id:A046419 - OEIS Search Results

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Repunit of length a(n) has exactly 8 prime factors (counted with multiplicity).

+0
2

28, 51, 55, 58, 77, 86, 95, 98 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`Eric Weisstein's World of Mathematics, Repunit` `P. De Geest, Repunits prime factors`
	CROSSREFS	`Cf. A000042, A004022, A046053.` `Sequence in context: A116541 A116565 A039615 this_sequence A063770 A039772 A043134` `Adjacent sequences: A046416 A046417 A046418 this_sequence A046420 A046421 A046422`
	KEYWORD	`nonn,more`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.