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%I #9 Apr 29 2018 09:30:55
%S 2,5,10,21,44,73,114,167,250,339,452,583,756,935,1126,1359,1598,1849,
%T 2130,2423,2782,3201,3632,4075,4566,5075,5668,6309,6962,7621,8304,
%U 9023,9766,10527,11336,12247,13200,14213,15232,16263,17312,18415,19638,20867
%N Sum of the first n Sophie Germain primes.
%H Nathaniel Johnston, <a href="/A066819/b066819.txt">Table of n, a(n) for n = 1..10000</a>
%t Accumulate[Select[Prime[Range[250]],PrimeQ[2#+1]&]] (* _Harvey P. Dale_, Apr 29 2018 *)
%Y Cf. A005384.
%K nonn
%O 1,1
%A _Joseph L. Pe_, Jan 19 2002
%E Extended beyond a(24) after confirming a(24). _Jonathan Vos Post_, Jan 23 2010
%E a(23) corrected by _Nathaniel Johnston_, Apr 29 2011
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