id:A104775 - OEIS Search Results

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Smallest semiprime containing exactly n 9's.

+0
2

9, 299, 5999, 19999, 899999, 5999999, 79999999, 299999999, 1999999999, 49999999999, 499999999999, 1999999999999, 29999999999999, 199999999999999, 1999999999999999, 29999999999999999, 599999999999999999 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`When (if ever) does this differ from A106663? - Andrew Plewe, Apr 11 2007`
	EXAMPLE	`a(2)=299 because 299 is the smallest semiprime containing exactly two 9's.`
	CROSSREFS	`Sequence in context: A003303 A012838 A061685 this_sequence A106663 A135609 A128788` `Adjacent sequences: A104772 A104773 A104774 this_sequence A104776 A104777 A104778`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 24 2005`

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

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