OFFSET
1,1
COMMENTS
Also numbers n such that A099824(n) is prime.
EXAMPLE
The sum of the first 10^1 primes is 129 which is not prime and not in the sequence. The sum of the first 10^9 primes is 11138479445180240497 which is prime and in the sequence.
PROG
(PARI)
sm=0; ct=0; p=1; bb=1;
{ while ( 1,
p = nextprime(p+1); sm += p; ct++;
if ( (ct==bb), if ( isprime(sm), print1(sm, ", ")); bb*=10; );
); }
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Cino Hilliard, Aug 27 2007
EXTENSIONS
a(5) from David Baugh, Sep 27 2016
STATUS
approved