OFFSET
1,1
COMMENTS
These are all primes of the form n!! + (n+1)!! Corresponding values of n are 0, 1, 2, 3, 4. At n>4, n!! + (n+1)!! is always composite, cf. A118333.
Apparently also the set of primes p(n) such that p(n)^2 - 2^n is prime. - Irina Gerasimova, May 09 2013
MATHEMATICA
Select[Array[#!! + (# + 1)!! &, 12, 0], PrimeQ] (* James C. McMahon, Sep 24 2024 *)
CROSSREFS
KEYWORD
fini,full,nonn,changed
AUTHOR
Zak Seidov, Apr 23 2006
STATUS
approved