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%I #14 Aug 02 2017 10:36:17
%S 1,7,21,35,35,21,7,1,7,42,105,140,105,42,7,0,21,105,210,210,105,21,0,
%T 0,35,140,210,147,77,105,140,105,77,112,105,77,210,420,420,210,63,42,
%U 21,105,420,630,420,105,7,7,0,140,420,420,161,105,211,210,105,126,210,105,105,420,637,462,210,182,147,42,217,630,672,420,420,427,210,42
%N Number of ways of writing n as a sum of seven nonnegative cubes.
%C Order matters. This is the coefficient of q^n in the expansion of {Sum_{m>=0} q^(m^3)}^7.
%C It is known that a(n)>0 if n is even and > 454.
%H Seiichi Manyama, <a href="/A173676/b173676.txt">Table of n, a(n) for n = 0..10000</a>
%H N. D. Elkies, <a href="http://arxiv.org/abs/1009.3983">Every even number greater than 454 is the sum of seven cubes</a>, arXiv:1009.3983
%Y Cf. A004829, A008451.
%Y Sums of k cubes, number of ways of writing n as, for k=1..9: A010057, A173677, A051343, A173678, A173679, A173680, A173676, A173681, A173682.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_, Nov 24 2010
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