

A105647


Increasing numbers whose digits satisfy the" Fractal Jump" rule: keep the first digit "d" of the sequence, then jump over the next "d" digits and keep the digit "e" on which you have landed. Jump now over the next "e" digits and keep the digit "f" on which you have landed, etc. The succession "def..." of kept digits is the sequence itself, whose digits are concatenated to form increasing numbers.


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2, 52, 55, 522, 2252, 5522, 22522, 222522, 2222222, 2225225, 2522525, 22252522, 25525252
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