id:A104760 - OEIS Search Results

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Smallest semiprime containing exactly n 7's.

+0
3

57, 77, 3777, 17777, 277777, 1777777, 17777777, 707777777, 3777777777, 17777777777, 577777777777, 1777777777777, 37777777777777, 757777777777777, 4777777777777777, 37777777777777777, 277777777777777777 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=77 because 77 is the smallest semiprime containing exactly two 7's.`
	CROSSREFS	`Adjacent sequences: A104757 A104758 A104759 this_sequence A104761 A104762 A104763` `Sequence in context: A039429 A043252 A044032 this_sequence A106662 A087922 A087921`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 24 2005`

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Last modified October 16 00:31 EDT 2008. Contains 145098 sequences.

AT&T Labs Research