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http://functions.wolfram.com/04.13.07.0013.01
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BernoulliB[n] == (1/(2 Pi I)) ContourIntegrate[1/(z^n (E^z - 1)),
{z, Abs[z] == 1}] /; Element[n, Integers] && n > 0
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Date Added to functions.wolfram.com (modification date)
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