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May 25, 2019 at 22:47 history edited Steven Clark CC BY-SA 4.0
Corrected a couple of formulas where the factorial should have been in the denominator.
May 25, 2019 at 21:33 history edited Steven Clark CC BY-SA 4.0
Added case for finite number of non-zero terms.
May 25, 2019 at 21:00 history answered Steven Clark CC BY-SA 4.0