帮我做这道题0,1,5,23,119,( )
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帮我做这道题0,1,5,23,119,( )
帮我做这道题0,1,5,23,119,( )
帮我做这道题0,1,5,23,119,( )
n!-1
1!-1=1-1=0
2!-1=1*2-1=1
3!-1=1*2*3-1=5
4!-1=23
5!-1=119
6!-1=719