In a sequence of numbers, the first number is 3, the second number is 4, and each subsequent number is the sum of all the numbers that appear before it. If the 20th number is X, what is the 25th number?

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In fact, it is ok to calculate one item at a time, but it is too big. Can be directly represented by x:

Numeric ordinal value

The 20 th x

2 1 time 2x

22nd 4x

23 8x

24 16x

25 32x