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%I #6 Aug 10 2015 00:26:38
%S 0,0,0,0,1,1,1,1,1,2,2,2,3,3,2,2,4,3,3,3,4,5,6,4,4,5,4,5,7,5,8,4,6,7,
%T 4,5,8,8,7,7,10,7,7,7,6,11,12,5,9,8,7,9,11,10,9,10,10,12,12,9,14,15,8,
%U 6,9,12,12,11,14,11,20,10,17,14,9,13,10,13,18,8,12,17,17,11,12,17
%N a(n) = number of squareful nonzero quadratic residues of n.
%H C. H. Gribble, <a href="/A165924/b165924.txt">Table of n, a(n) for n=1..1000</a>.
%Y Cf. A165919.
%K nonn
%O 1,10
%A _Christopher Hunt Gribble_, Sep 30 2009
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