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A113401
Algebraic degree of cos(2*Pi/n) for constructible n-gons (A003401).
1
1, 1, 1, 1, 2, 1, 2, 2, 2, 4, 4, 8, 4, 4, 4, 8, 8, 8, 8, 16, 8, 16, 16, 16, 32, 16, 16, 16, 32, 32, 32, 32, 32, 32, 32, 64, 64, 128, 64, 64, 64, 64, 64, 64, 64, 128, 128, 128, 128, 128, 128, 256, 128, 128, 128, 256, 256, 256, 256, 512, 256, 256, 256, 256, 256, 256, 512
OFFSET
1,5
LINKS
Eric Weisstein's World of Mathematics, Trigonometry Angles
CROSSREFS
KEYWORD
nonn,easy,nice
AUTHOR
Eric W. Weisstein, Oct 28 2005
STATUS
approved