OFFSET
1,1
COMMENTS
The subsequence of prime partial sums of safe primes begins: 5, 23, 509, 2267, 9157, 26437. The subsubsequence of safe prime partial sums of safe primes begins: 5, 23, and then what values? Note that A172037 Prime partial sums of Sophie Germain primes A005384 is related because 2p+1 is called a safe prime if p is a Sophie Germain prime. - Jonathan Vos Post, Jan 30 2010
MATHEMATICA
Accumulate[Select[Prime[Range[350]], PrimeQ[(#-1)/2]&]] (* Harvey P. Dale, Jul 27 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Joseph L. Pe, Jan 21 2002
STATUS
approved