id:A162731 - OEIS Search Results

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The n-th number which is a product of three primes minus its central prime factor.

+0
1

6, 10, 15, 18, 24, 26, 27, 39, 42, 42, 45, 50, 60, 63, 66, 65, 70, 74, 75, 90, 91, 96, 99, 100, 105, 111, 114, 114, 122, 120, 125, 135, 140, 146, 150, 147, 162, 160, 165, 168, 170, 171, 170, 175, 183, 186, 185, 190, 204, 210, 219, 225, 224, 234, 231, 231, 242, 238, 243, 250 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=A014612(n)-A162361(n).`
	EXAMPLE	`a(1)=6=222-2. a(2)=10=223-2. a(3)=15=233-3. a(4)=18=225-2. a(5)=24=333-3.`
	CROSSREFS	`Cf. A014612, A162361.` `Sequence in context: A151975 A094564 A166160 this_sequence A145286 A006987 A157937` `Adjacent sequences: A162728 A162729 A162730 this_sequence A162732 A162733 A162734`
	KEYWORD	`nonn,less`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 12 2009`
	EXTENSIONS	`Definition reformulated, a(11), a(38) etc. corrected by R. J. mathar (mathar(AT)strw.leidenuniv.nl), Jul 16 2009`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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