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(prime(n-1) + 1)*(prime(n+1) - 1).
2

%I #6 Feb 19 2017 22:14:10

%S 12,24,60,96,192,252,396,560,720,1080,1280,1596,1932,2288,2784,3240,

%T 3960,4340,4896,5616,6068,7040,8064,9000,9996,10812,11232,12096,13860,

%U 14820,17408,18216,20424,21000,23400,24624,26228,28208,29904,31320

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

%C a(n) = A006093(n+1)*A008864(n-1).

%H Robert Israel, <a href="/A087105/b087105.txt">Table of n, a(n) for n = 2..10000</a>

%e a(10)=(prime(9)+1)*(prime(11)-1)=(23+1)*(31-1)=720.

%p seq((ithprime(i)+1)*(ithprime(i+2)-1),i=1..100); # _Robert Israel_, Feb 19 2017

%Y Cf. A087106.

%K nonn

%O 2,1

%A _Reinhard Zumkeller_, Aug 10 2003