3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
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3*4*5,4*5*6,5*6*7,7*8*9,...,第n个数是__3*4*5,4*5*6,5*6*7,7*8*9,...,第n个数是__3*4*5,4*5*6,5*6*7,7*8*9,...,第n
3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
3*4*5,4*5*6,5*6*7,7*8*9 ,...,第n个数是__
(n+2)*(n+3)*(n+4)