id:A106556 - OEIS Search Results

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Smallest number formed by concatenating the two factors of a semiprime.

+0
1

22, 23, 33, 25, 27, 35, 37, 112, 55, 132, 113, 172, 57, 192, 133, 223, 77, 173, 115, 193, 229 (list; graph; listen)

	OFFSET	`22,1`
	EXAMPLE	`First semiprime is 4; 4 is 22 -> 22.` `Second semiprime is 6; 6 is 23 -> 23.` `...` `Eighth semiprime is 22; 22 is 11x2 -> 112 (and not 211).`
	CROSSREFS	`Sequence in context: A092624 A091404 A146755 this_sequence A106554 A118297 A022392` `Adjacent sequences: A106553 A106554 A106555 this_sequence A106557 A106558 A106559`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Eric Angelini (eric.angelini(AT)kntv.be), May 09 2005`

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