A087105 - OEIS

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A087105

(prime(n-1) + 1)*(prime(n+1) - 1).

12, 24, 60, 96, 192, 252, 396, 560, 720, 1080, 1280, 1596, 1932, 2288, 2784, 3240, 3960, 4340, 4896, 5616, 6068, 7040, 8064, 9000, 9996, 10812, 11232, 12096, 13860, 14820, 17408, 18216, 20424, 21000, 23400, 24624, 26228, 28208, 29904, 31320 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`2,1`
	COMMENTS	`a(n) = A006093(n+1)*A008864(n-1).`
	LINKS	`Robert Israel, Table of n, a(n) for n = 2..10000`
	EXAMPLE	`a(10)=(prime(9)+1)(prime(11)-1)=(23+1)(31-1)=720.`
	MAPLE	`seq((ithprime(i)+1)*(ithprime(i+2)-1), i=1..100); # Robert Israel, Feb 19 2017`
	CROSSREFS	`Cf. A087106.` `Sequence in context: A289132 A348716 A098585 * A230355 A063975 A227895` `Adjacent sequences: A087102 A087103 A087104 * A087106 A087107 A087108`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller, Aug 10 2003`
	STATUS	`approved`

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Last modified March 31 20:59 EDT 2023. Contains 361673 sequences. (Running on oeis4.)