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