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1, 1/2, 5/12, 3/8, 251/720, 95/288, 19087/60480, 5257/17280,
1/2, 1/6, 1/8, 19/180, 3/32, 863/10080, 275/3456,
1/3, 1/12, 7/120, 17/360, 41/1008, 731/20160, 8563/259200,
1/4, 1/20, 1/30, 11/420, 89/4032,5849/302400,
1/5, 1/30, 3/140, 83/5040, 59/4320,
1/6, 1/42, 5/336,
1/7, 1/56,
1/8.
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