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A089929
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Algebraic degree of Cot[Pi/n].
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0
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1, 2, 1, 4, 2, 6, 2, 6, 4, 10, 2, 12, 6, 8, 4, 16, 6, 18, 4, 12, 10, 22, 4, 20, 12, 18, 6, 28, 8, 30, 8, 20, 16, 24, 6, 36, 18, 24, 8, 40, 12, 42, 10, 24, 22, 47, 8, 42, 20, 32, 12
(list; graph; refs; listen; history; internal format)
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