OFFSET
1,1
COMMENTS
Primes of the form A070826(n)+2.
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..18
FORMULA
EXAMPLE
a(4) = 107 because 107 is a prime of the form primorial(7)/2 + 2 = A070826(4) + 2 = 2*3*5*7/2 + 2.
PROG
(PARI) for(n=1, 30, p=prod(k=1, n, prime(k))/2+2; if(ispseudoprime(p), print1(p, ", "))) \\ Hugo Pfoertner, Dec 26 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Jun 27 2004
EXTENSIONS
a(1) inserted by Amiram Eldar, Dec 26 2019
STATUS
approved