

A108381


Number of distinct magnitudes of the nonzero sums of distinct nth roots of unity.


3



1, 1, 1, 2, 3, 3, 8, 9, 16, 17, 62, 23, 186, 95, 280, 240, 1963, 225, 6830, 1091
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OFFSET

1,4


COMMENTS

There are 2^n sums of the nth roots of unity.


LINKS



EXAMPLE

a(4)=2 because the nonzero sums of 4th roots of unity have magnitude 1 or sqrt(2).


CROSSREFS

Cf. A103314 (number of subsets of the nth roots of unity summing to zero).


KEYWORD

nonn


AUTHOR



STATUS

approved



