id:A104669 - OEIS Search Results

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Smallest semiprime containing exactly n 2's.

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21, 22, 2122, 20222, 202222, 1222222, 22220222, 122222222, 2222222221, 22222222226, 202222222222, 2222212222222, 22222222222223, 212222222222222, 2222222222212222, 22222222202222222, 202222222222222222 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=22 because 22 is the smallest semiprime containing exactly two 2's.`
	CROSSREFS	`Sequence in context: A041920 A041921 A041922 this_sequence A156891 A151910 A095459` `Adjacent sequences: A104666 A104667 A104668 this_sequence A104670 A104671 A104672`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 24 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research