id:A104690 - OEIS Search Results

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Smallest semiprime containing exactly n 4's.

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4, 445, 4414, 44441, 444441, 4444441, 44444441, 444444449, 4444444441, 44444444443, 444444444447, 4444444444443, 44444444444441, 444444444444445, 4444444444444447, 44444444444444447, 444444444444444442 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=445 because 445 is the smallest semiprime containing exactly two 4's.`
	CROSSREFS	`Sequence in context: A053780 A159514 A034985 this_sequence A035483 A145570 A053292` `Adjacent sequences: A104687 A104688 A104689 this_sequence A104691 A104692 A104693`
	KEYWORD	`base,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 24 2005`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research