id:A118643 - OEIS Search Results

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Lucky numbers n whose prime factors are also lucky numbers.

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1, 3, 7, 9, 13, 21, 31, 37, 43, 49, 63, 67, 73, 79, 93, 111, 127, 129, 151, 163, 169, 189, 193, 201, 211, 219, 223, 237, 241, 259, 273, 283, 307, 331, 349, 367, 409, 421, 433, 463, 487, 489, 511, 541, 553, 559, 577, 579, 601, 613, 619, 631, 643, 651, 673, 723 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`189 is included since 189 is lucky, and 189 = 333*7 has prime factors that are all lucky.`
	CROSSREFS	`Cf. A000959.` `Sequence in context: A107771 A103601 A111250 this_sequence A043772 A109370 A018663` `Adjacent sequences: A118640 A118641 A118642 this_sequence A118644 A118645 A118646`
	KEYWORD	`easy,nonn`
	AUTHOR	`Adam Panagos (adam.panagos(AT)gmail.com), May 10 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

AT&T Labs Research