[1,2,1,6,3,2,24,12,8,6,120,60,40,30,24,720,360,
240,180,144,120,5040,2520,1680,1260,1008,840,720,
40320,20160,13440,10080,8064,6720,5760,5040,
362880,181440,120960,90720,72576,60480,51840,
45360,40320,3628800,1814400,1209600,907200,725760,
604800,518400,453600,403200,362880]
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