A066869 Sum of the first n safe primes.

5, 12, 23, 46, 93, 152, 235, 342, 509, 688, 915, 1178, 1525, 1884, 2267, 2734, 3213, 3716, 4279, 4866, 5585, 6424, 7287, 8174, 9157, 10176, 11363, 12646, 13953, 15272, 16639, 18078, 19565, 21088, 22707, 24530, 26437, 28464, 30503, 32566, 34665

Offset: 1

Author

Joseph L. Pe, Jan 21 2002

Keywords

• easy
• nonn

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

Crossrefs

Cf. A005385.

Cf. A172037. - Jonathan Vos Post, Jan 30 2010

Programs

Mathematica

Accumulate[Select[Prime[Range[350]],PrimeQ[(#-1)/2]&]] (* Harvey P. Dale, Jul 27 2011 *)