Hello, Erin. It's a really interesting problem. According to Solution 1539769, I think it would be worthwhile for you to include some (small) tolerances within the assert statements in your Test Suite, to allow for rounding due to computations in 'double precision'. —DIV
I agree with David.
I used my brute-force solution (7421995) to generate enough data to deduce the pattern. Some day I might be able to derive the formula from scratch...
Roll the Dice!
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