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A056343
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Number of bracelets using exactly three different colored beads.
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2
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0, 0, 1, 6, 18, 56, 147, 411, 1084, 2979, 8043, 22244, 61278, 171030, 477929, 1345236, 3795750, 10758902, 30572427, 87149124, 248991822, 713096352, 2046303339, 5883433409, 16944543810, 48879769575
(list; graph; refs; listen; history; internal format)
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