p + primorial/p is prime

[Jacques Tramu]

>From: "Leroy Quet" <q1qq2qqq3qqqq at yahoo.com>
>Subject: p + primorial/p is prime


> Could someone please calculate some terms of this
> sequence?
> a(n) = the number of primes p, p <= the nth
> prime, where
> p + (1/p)product{k=1 to n} p(k)
> is prime, where p(k) is the kth prime.

First 200 terms :

1,2,3,4,3,4,3,2,2,5,2,4,2,2,6,2,3,4,4,3,5,1,3,3,3,2,3,3,6,2,1,0,0,1,2,6,2,3,1,7,3,1,1,2,0,1,4,4,2,4,4,0,3,3,4,1,2,
4,2,2,1,2,2,2,1,3,2,1,4,3,2,3,2,3,3,4,5,2,2,5,4,2,2,1,2,2,1,5,0,2,1,2,4,2,4,4,1,5,1,1,1,3,2,1,1,4,1,2,1,1,2,1,0,3,
3,1,2,4,2,2,1,2,0,3,0,5,4,2,1,3,2,3,0,4,1,1,0,2,3,2,4,3,5,3,0,1,4,4,1,0,2,4,4,0,3,3,1,2,3,3,1,0,1,2,1,4,0,3,3,2,0,
1,2,3,3,5,2,2,2,3,1,4,1,1,0,6,2,1,1,2,5,0,4,1,1,3,1,1,2

regards,
JT

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