This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A135483 #26 Jun 25 2022 00:51:28
%S A135483 1,4,14,42,130,338,882,2098,5042,12466,28338,66226,150194,326322,
%T A135483 711346,1579698,3513010,7510706,16292530,34904754,73177778,156015282,
%U A135483 330078898,703371954,1517066930,3211565746,6667672242,13848320690,28478053042,58811259570
%N A135483 a(n) = Sum_{j=1..n} prime(j)*2^(j-2).
%H A135483 G. C. Greubel, <a href="/A135483/b135483.txt">Table of n, a(n) for n = 1..1000</a>
%t A135483 Table[Sum[2^(i-2) * Prime[i], {i, 1, n}], {n, 1, 10}] (* _G. C. Greubel_, Oct 15 2016 *)
%t A135483 Accumulate[Table[Prime[i]*2^(i-2),{i,30}]] (* _Harvey P. Dale_, Aug 14 2019 *)
%o A135483 (PARI) a(n) = sum(k=1, n, prime(k)*2^(k-2)); \\ _Michel Marcus_, Oct 15 2016
%Y A135483 Cf. A000040, A000079, A092844, A110299.
%Y A135483 Partial sums of A239885.
%K A135483 nonn,easy
%O A135483 1,2
%A A135483 _Ctibor O. Zizka_, Feb 07 2008