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 A254784 #11 Feb 08 2015 17:43:36
%S A254784 2,13,50,147,366,810,1640,3094,5510,9355,15256,24037,36760,54768,
%T A254784 79732,113704,159176,219141,297160,397433,524872,685180,884934,
%U A254784 1131674,1434000,1801673,2245718,2778531,3413988,4167558,5056430,6099644,7318228,8735337,10376402
%N A254784 Apply partial sum operator 5 times to primes.
%C A254784 Row 5 in A254858. - _Reinhard Zumkeller_, Feb 08 2015
%H A254784 Harvey P. Dale, <a href="/A254784/b254784.txt">Table of n, a(n) for n = 1..1000</a>
%t A254784 With[{nn=5},Nest[Accumulate[#]&,Prime[Range[50]],nn]]
%o A254784 (Haskell)
%o A254784 a254784 n = a254784_list !! (n-1)
%o A254784 a254784_list = (iterate (scanl1 (+)) a000040_list) !! 5
%o A254784 -- _Reinhard Zumkeller_, Feb 08 2015
%Y A254784 Cf. A007504, A014148, A014150, A178138.
%Y A254784 Cf. A254858.
%K A254784 easy,nonn
%O A254784 1,1
%A A254784 _Harvey P. Dale_, Feb 07 2015