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Harvey P. Dale, <a href="/A153474/b153474.txt">Table of n, a(n) for n = 1..18</a>
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Accumulate[2^MersennePrimeExponent[Range[15]]-1] (* Harvey P. Dale, Feb 28 2023 *)
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_Omar E. Pol (info(AT)polprimos.com), _, Dec 27 2008
More terms from _Max Alekseyev (maxale(AT)gmail.com), _, Apr 13 2009
3, 10, 41, 168, 8359, 139430, 663717, 2148147364, 2305843011361841315, 618970021948533148811403426, 162259895799235311924726821691553, 170141345720365030966999228442705797280
more,nonn,new
nonn
More terms from Max Alekseyev (maxale(AT)gmail.com), Apr 13 2009