A066819 Sum of the first n Sophie Germain primes.

2, 5, 10, 21, 44, 73, 114, 167, 250, 339, 452, 583, 756, 935, 1126, 1359, 1598, 1849, 2130, 2423, 2782, 3201, 3632, 4075, 4566, 5075, 5668, 6309, 6962, 7621, 8304, 9023, 9766, 10527, 11336, 12247, 13200, 14213, 15232, 16263, 17312, 18415, 19638, 20867

Offset: 1

Author

Joseph L. Pe, Jan 19 2002

Keywords

• nonn

Links

• Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A005384.

Programs

Mathematica

Accumulate[Select[Prime[Range[250]],PrimeQ[2#+1]&]] (* Harvey P. Dale, Apr 29 2018 *)

Extensions

Extended beyond a(24) after confirming a(24). Jonathan Vos Post, Jan 23 2010

a(23) corrected by Nathaniel Johnston, Apr 29 2011