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A108381 Number of distinct magnitudes of the nonzero sums of distinct n-th roots of unity. 3
1, 1, 1, 2, 3, 3, 8, 9, 16, 17, 62, 23, 186, 95, 280, 240, 1963, 225, 6830, 1091 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
There are 2^n sums of the n-th 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 n-th roots of unity summing to zero).
Sequence in context: A011155 A161136 A258163 * A238761 A261469 A292498
KEYWORD
nonn
AUTHOR
T. D. Noe, Jun 01 2005
STATUS
approved

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Last modified June 21 03:23 EDT 2024. Contains 373535 sequences. (Running on oeis4.)