A046415 - OEIS

This site is supported by donations to The OEIS Foundation.

A046415

Repunit of length a(n) has exactly 4 prime factors (counted with multiplicity).

8, 9, 10, 14, 41, 43, 49, 53, 109, 157, 167, 173, 197, 199, 223, 229, 269 (list; graph; refs; listen; history; internal format)

	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: A164276 A154967 A072381 * A091417 A069237 A070480` `Adjacent sequences: A046412 A046413 A046414 * A046416 A046417 A046418`
	KEYWORD	`nonn,more`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`
	EXTENSIONS	`More terms from Robert Gerbicz (robert.gerbicz(AT)gmail.com), Nov 22 2010`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 11:18 EST 2012. Contains 206011 sequences.