This returns true for a = 2 and b = 6, but it shouldn't
Any suggestions for improving the test suite would be appreciated!
Adding test cases a=105 b=30 and a=111 b=3 should weed out a couple of less-than-general solutions.
Add decimal and irrational numbers, but only check if the n-first digits are a permutation of each other.
Back and Forth Rows
Sums with Excluded Digits
Project Euler: Problem 16, Sums of Digits of Powers of Two
Write c^3 as sum of two squares a^2+b^2
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