OFFSET
1,1
COMMENTS
Primes of the form A010790(k)-1 or A010790(k)+1. This is the 2nd sequence in the supersequence whose first member is factorial primes, A002981 UNION A002982. No more through 20!*(20+1)! + 1.
a(9) has already 225 digits. The terms are generated by n= 0,1,2,2,4,5,14,32,76,166... [From R. J. Mathar, Aug 31 2010]
EXAMPLE
a(6) = 86399 because 5!*(5+1)! - 1 = 86399 is prime. a(7) = 114000816848279961600001 because 14!*(14+1)! + 1 = 114000816848279961600001 is prime.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Jonathan Vos Post, Apr 07 2010
EXTENSIONS
One more term from R. J. Mathar, Aug 31 2010
STATUS
approved