Test added to discourage lookup table solutions.
In the problem description, r1 and r2 appear to be upside down.
Corrected. Thanks, Tim.
Getting logical indexes
Return a list sorted by number of consecutive occurrences
Create the following sequence : 0 1 1 4 9 25 64 169 ...
Sum the real and imaginary parts of a complex number
Return fibonacci sequence do not use loop and condition
Investigate the frequency of last non-zero digits of primorials
List ways to reach a target sum
Evaluate the prime zeta function
List the nth prime quartet prefix
Evaluate the Struve function
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