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    $\begingroup$ wow! the pattern is quite beautiful $\endgroup$
    – vhis
    Commented May 26, 2020 at 14:24
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    $\begingroup$ and looks like a exquisite guess the next number... 1, 3, 7, 15, 31, 63, and the next number is not 127 $\endgroup$
    – SeanC
    Commented May 26, 2020 at 17:10