按规律填数3,4,7,9,15,16,31,25()()()

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按规律填数3,4,7,9,15,16,31,25()()()按规律填数3,4,7,9,15,16,31,25()()()按规律填数3,4,7,9,15,16,31,25()()()3,4,7,9,15

按规律填数3,4,7,9,15,16,31,25()()()
按规律填数3,4,7,9,15,16,31,25()()()

按规律填数3,4,7,9,15,16,31,25()()()
3,4,7,9,15,16,31,25(63)(36)(127)
规律:
3 7 15 31 63 127这一组都是2^n-1
4 9 16 45 36 这一组都是n^2