Test added to discourage lookup table solutions.
In the problem description, r1 and r2 appear to be upside down.
Corrected. Thanks, Tim.
5 Prime Numbers
Determine the Zeckendorf expansion of a number
Compute the nth Naerogahtyp emirp
Find the nth Fibbinary number
Compute a row of the Kimberling shuffle
Compute a sum of Ramanujan
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