ps5/gap.py


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from math import cos, pi


def gap(n):
    qp = n - 1
    sdp = n * (1 - cos(2 * pi / n * (n / 2))) / 2.
    return qp / sdp


for i in xrange(3, 1000, 2):
    print "{0:3}: {1}".format(i, gap(i))