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 A227547 #17 Sep 08 2022 08:46:05
%S A227547 3,5,8,13,20,31,44,61,80,103,132,163,200,241,284,331,384,443,504,571,
%T A227547 642,715,794,877,966,1063,1164,1267,1374,1483,1596,1723,1854,1991,
%U A227547 2130,2279,2430,2587,2750,2917,3090,3269,3450,3641,3834,4031,4230,4441,4664
%N A227547 a(n) = a(n-1) + prime(n-1), with a(1)=3.
%H A227547 Vincenzo Librandi, <a href="/A227547/b227547.txt">Table of n, a(n) for n = 1..1000</a>
%F A227547 a(n) = A036439(n) + 1 = A014284(n) + 2 = A007504(n-1) + 3 (in this case, n>1).
%t A227547 Accumulate[Join[{3}, Prime[Range[60]]]]
%o A227547 (Magma) [IsOne(n) select 3 else Self(n-1)+NthPrime(n-1): n in [1..50]]; // _Bruno Berselli_, Jul 30 2013
%Y A227547 Cf. A007504, A014284, A036439.
%K A227547 nonn,easy
%O A227547 1,1
%A A227547 _Vincenzo Librandi_, Jul 27 2013