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A056292
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Number of n-bead necklace structures using a maximum of four different colored beads.
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4
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1, 2, 3, 7, 11, 39, 103, 367, 1235, 4439, 15935, 58509, 215251, 799697, 2983217, 11187567, 42109451, 159082753, 602809327, 2290684251, 8726308317, 33318661277, 127479700199, 488672302909, 1876500180291
(list; graph; refs; listen; history; internal format)
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