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A066313
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Number of aperiodic necklaces with n red or blue beads such that two necklaces are equivalent under the operation (turn necklace over and switch the two colors).
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2
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1, 1, 1, 2, 3, 6, 9, 18, 28, 57, 93, 181, 315, 612, 1091, 2100, 3855, 7392, 13797, 26436, 49929, 95790, 182361, 350440, 671088, 1292445, 2485504, 4797261, 9256395, 17903316, 34636833, 67124160, 130150493, 252675975, 490853403
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