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

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