找规律填数:2,4,13,61,( ),( )
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找规律填数:2,4,13,61,( ),( )
找规律填数:2,4,13,61,( ),( )
找规律填数:2,4,13,61,( ),( )
(2-1)*3+1=4
(4-1)*4+1=13
(13-1)*5+1=61
(61-1)*6+1=361
(361-1)*7+1=2521