%I #2 Mar 30 2012 17:22:40
%S 1,1,1,2,3,3,8,9,16,17,62,23,186,95,280,240,1963,225,6830,1091
%N Number of distinct magnitudes of the nonzero sums of distinct nth roots of unity.
%C There are 2^n sums of the nth roots of unity.
%H T. D. Noe, <a href="http://www.sspectra.com/math/RootSums.html">Sums of Roots of Unity Plots</a>
%e a(4)=2 because the nonzero sums of 4th roots of unity have magnitude 1 or sqrt(2).
%Y Cf. A103314 (number of subsets of the nth roots of unity summing to zero).
%K nonn
%O 1,4
%A _T. D. Noe_, Jun 01 2005
