找规律3,5,14,55,2743,5,14,55,274,( ) ,11500

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找规律3,5,14,55,2743,5,14,55,274,(),11500找规律3,5,14,55,2743,5,14,55,274,(),11500找规律3,5,14,55,2743,5,14,5

找规律3,5,14,55,2743,5,14,55,274,( ) ,11500
找规律3,5,14,55,274
3,5,14,55,274,( ) ,11500

找规律3,5,14,55,2743,5,14,55,274,( ) ,11500
(1643)
3*2-1=5
5*3-1=14
14*4-1=55
55*5-1=274
274*6-1=1643
1643*7-1=11500

a
a*2-1=b
b*3-1=c
c*4-1=d
............