Problem 58013. Find a number m such that 2m and the square of m have the same digit sum
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> 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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