%I #8 Feb 28 2023 10:07:59

%S 3,10,41,168,8359,139430,663717,2148147364,2305843011361841315,

%T 618970021948533148811403426,162259895799235311924726821691553,

%U 170141345720365030966999228442705797280

%N Sum of first n Mersenne primes A000668.

%H Harvey P. Dale, <a href="/A153474/b153474.txt">Table of n, a(n) for n = 1..18</a>

%t Accumulate[2^MersennePrimeExponent[Range[15]]-1] (* _Harvey P. Dale_, Feb 28 2023 *)

%Y Cf. A007504, A092336, A000668, A153475.

%K nonn

%O 1,1

%A _Omar E. Pol_, Dec 27 2008

%E More terms from _Max Alekseyev_, Apr 13 2009