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A028311
Odd numbers n such that {1..n-1} can be partitioned into disjoint sets I, J with 2I = -J (mod n) such that I, J are unions of cyclotomic cosets mod n.
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2
5, 7, 13, 17, 23, 25, 29, 31, 35, 37
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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