id:A073046 - OEIS Search Results

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Write 2n=p+q (p,q prime), p*q minimal; then a(n)=p*q.

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4, 9, 15, 21, 35, 33, 39, 65, 51, 57, 95, 69, 115, 161, 87, 93, 155, 217, 111, 185, 123, 129, 215, 141, 235, 329, 159, 265, 371, 177, 183, 305, 427, 201, 335, 213, 219, 365, 511, 237, 395, 249, 415, 581, 267, 445, 623, 1501, 291, 485, 303, 309, 515, 321, 327 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`Least semiprime whose sum of prime factors = 2n.`
	EXAMPLE	`n=13: 2n=26; 26=23+3=19+7=13+13; 233=minimal => pq=23*3=69`
	CROSSREFS	`Sequence in context: A103395 A103393 A103392 this_sequence A066495 A134227 A055999` `Adjacent sequences: A073043 A073044 A073045 this_sequence A073047 A073048 A073049`
	KEYWORD	`nonn`
	AUTHOR	`Werner Sand (werner.sand(AT)tiscalimail.de), Aug 31 2002`
	EXTENSIONS	`Corrected by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jun 11 2005`

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Last modified March 17 15:31 EDT 2010. Contains 173524 sequences.

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