Search: id:A014203
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%I A014203
%S A014203 0,6,30,54,78,198,342,342,438,708,948,1212,1308,1620,2292,2292,2388,
%T A014203 3204,3852,4308,4788,5796,6324,6324,6900,7650,9522,10386,10386,12474,
%U A014203 13914,13914,14298,15882,17514,19194,20274,21162,23898,23898,24858
%N A014203 Sum {i^2+j^2+k^2}, i^2+j^2+k^2 <= n.
%D A014203 J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", 
               Springer-Verlag, p. 107.
%e A014203 Take n=3 say. The sum contains the terms 0 (once) from (0,0,0); 1 (6 
               times) from (+-1,0,0); 2 (12 times) from (+-1, +-1, 0); and 3 (8 
               times) from (+-1, +-1, +-1); for a total of 0+6+24+24=54.
%Y A014203 Sequence in context: A100194 A070195 A110175 this_sequence A044083 A024406 
               A024365
%Y A014203 Adjacent sequences: A014200 A014201 A014202 this_sequence A014204 A014205 
               A014206
%K A014203 nonn
%O A014203 0,2
%A A014203 E.V. Flynn (evflynn(AT)liverpool.ac.uk)
%E A014203 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Feb 05 2000

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