A131409 - OEIS

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A131409

Middle of three subsequent semiprimes with common prime factor = 3.

3909, 87627, 132609, 163491, 167451, 170679, 209289, 224151, 270591, 309273, 318651, 327423, 340077, 340077, 395121, 444459, 481863, 497121, 522231, 536451, 584589 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	List of triples: {3903, 3909, 3921}, {87621, 87627, 87663}, {132603, 132609, 132621}, {163479, 163491, 163497}, {167439, 167451, 167457}, {170673, 170679, 170691}, {209283, 209289, 209301}, {224139, 224151, 224157}, {270573, 270591, 270597}, {309261, 309273, 309279}, {318639, 318651, 318657}, {327417, 327423, 327441}, {340071, 340077, 340089}, {340071, 340077, 340089}, {395103, 395121, 395133}, {444453, 444459, 444471}, {481857, 481863, 481881}, {497109, 497121, 497127}, {522213, 522231, 522237}, {536439, 536451, 536457}, {584583, 584589, 584601}.
	CROSSREFS	`Sequence in context: A066386 A068240 A022212 * A136459 A034283 A179139` `Adjacent sequences: A131406 A131407 A131408 * A131410 A131411 A131412`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 01 2007`

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Last modified February 16 04:47 EST 2012. Contains 205860 sequences.