id:A050692 - OEIS Search Results

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Largest prime factor of composite a(n) is a substring of a(n).

+0
3

15, 25, 32, 36, 45, 50, 70, 75, 110, 125, 128, 130, 135, 147, 150, 170, 175, 190, 225, 230, 243, 250, 256, 290, 310, 324, 370, 375, 378, 384, 405, 410, 430, 432, 450, 470, 500, 512, 530, 540, 567, 590, 610, 625, 670, 672, 675, 700, 710, 730, 735, 750, 756 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`E.g. 175 = 1{7}5 = 5.5.{7}.`
	CROSSREFS	`Cf. A050691, A050693.` `Sequence in context: A067343 A120746 A102802 this_sequence A050693 A069823 A133321` `Adjacent sequences: A050689 A050690 A050691 this_sequence A050693 A050694 A050695`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research