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%I #3 Mar 30 2012 16:48:53
%S 2,6,8,12,16,16,22,26,26,30,34,38,40,44,44,48,56,56,60,60,62,70,74,74,
%T 78,82,82,86,90,94,96,104,104,104,108,108,116,120,124,128,128,128,134,
%U 138,138,142,150,150,154,158,158,166,166,166,166,174
%N Number of points (x,y) in square lattice with (x-1/2)^2+y^2 <= n.
%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 106.
%Y Partial sums of A004020. Cf. A057656, A057961, A057962.
%K nonn
%O 0,1
%A _N. J. A. Sloane_, Oct 15 2000
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