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%I #8 Mar 23 2022 12:51:11
%S 0,0,2,10,28,60,110,174,256,368,498,682,884,1140,1422,1750,2104,2560,
%T 3026,3546,4140,4828,5542,6382,7224,8136,9122,10274,11460,12732,14094,
%U 15558,17080,18752,20458,22410,24364,26516,28678,31006,33400
%N Open 3-dimensional ball numbers (version 2): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2,0,0).
%C a(n)/(n/2)^3 - > (4/3)*Pi.
%K easy,nonn
%O 0,3
%A Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Jan 19 2000
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