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 A175704 #5 Jul 10 2012 11:44:34
%S A175704 0,0,4,12,17,32,54,78,95,102,149,188,213,254,360,408,463,488,617,636,
%T A175704 769,784,1111,1060,1231,1172,1505,1408,1756,1574,1990,2060,2451,2096,
%U A175704 3099,2500,2729,2862,3683,3368,4166,3902,4523,4396,4987,4424,6579,5228
%N A175704 Auto-convolution of A008472.
%C A175704 A008472 is the sum of the distinct primes dividing n.
%F A175704 a(n) = Sum_{k=1..n} A008472(k)*A008472(n+1-k).
%p A175704 A175704 := proc(n)
%p A175704 add(A008472(k)*A008472(n+1-k),k=1..n) ;
%p A175704 end proc: # _R. J. Mathar_, Jul 10 2012
%K A175704 nonn
%O A175704 1,3
%A A175704 _Michel Lagneau_, Aug 10 2010