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

1,1

Links

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

Mathematica

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

Crossrefs

Cf. A005384.

Sequence in context: A267444 A267880 A101510 * A114279 A101400 A131403

Adjacent sequences: A066816 A066817 A066818 * A066820 A066821 A066822

Keyword

nonn

Author

Joseph L. Pe, Jan 19 2002

Extensions

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

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

Status

approved