找规律填数:2,4,13,61,( ),( )

问题描述:

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