OFFSET
1,1
COMMENTS
a(1) = 2, a(2) = 3, a(3) = 4, a(4) = 5. It can be seen as a nice consecutiveness on sequence for first four items. Another point is that sequence of prime(n+1)! / prime(n) is observed in A260754.
a(7) > 2300. - Giovanni Resta, Aug 28 2015
EXAMPLE
For n=2 the (prime(n+1)! / prime(n)) + 1 = 41. 41 is prime.
PROG
(PARI) for(n=1, 1e3, if(isprime(k=((prime(n+1)!/prime(n))+1)), print1(n", ")))
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Altug Alkan, Aug 27 2015
STATUS
approved