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Partial sums of A011764.
3

%I #12 Sep 08 2019 12:19:42

%S 3,12,93,6654,43053375,1853020231905216,

%T 3433683820292514337678080994497,

%U 11790184577738583171520872861415952349498504106613519190091458

%N Partial sums of A011764.

%H Seiichi Manyama, <a href="/A115245/b115245.txt">Table of n, a(n) for n = 0..11</a>

%t Accumulate[3^(2^Range[0,10])] (* _Harvey P. Dale_, Oct 14 2012 *)

%o (PARI) {a(n) = sum(k=0, n, 3^2^k)} \\ _Seiichi Manyama_, Sep 08 2019

%Y Cf. A011764, A060803.

%K nonn

%O 0,1

%A _Roger L. Bagula_, Jun 07 2008