按照规律填数9,21,81,(),()

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按照规律填数9,21,81,(),()按照规律填数9,21,81,(),()按照规律填数9,21,81,(),()9,21,81,441,2961规律如下:9+3*4=2121+3*4*5=8181+

按照规律填数9,21,81,(),()
按照规律填数9,21,81,(),()

按照规律填数9,21,81,(),()
9,21,81,441,2961
规律如下:
9+3*4=21
21+3*4*5=81
81+3*4*5*6=441
441+3*4*5*6*7=2961