Problem 58013. Find a number m such that 2m and the square of m have the same digit sum
has the property that 
and 
have the same digit sum. It is the seventh number, including zero, in the sequence of numbers with that property. Solution Stats
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2 Comments
> It is the sixth number, including zero, in the sequence of numbers with that property.
Isn't it the seventh?
Also, out of curiosity, why are you disallowing persistent variables?
Yes, seventh--corrected, thanks. Bitten by the "off by one bug" again.
Banning persistent is to add the challenge of dealing with large numbers in Cody time. A while ago I found a quicker way to find the digit sums of a lot of numbers, and this problem was another place to exploit that method.
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