Return the number of edges on an n-dimensional hypercube (with an integer n ≥ 0).
Neither string operations nor interpolations are allowed!
Thanks for the nice problem! It is refreshing!
Project Euler: Problem 7, Nth prime
Project Euler: Problem 10, Sum of Primes
Multiply a column by a row
Find the hypotenuse
Hexagonal Tiling Dots in a Circle
Triangular Tiling Dots in a Circle
Shifted Hexagonal Tiling Dots in a Circle
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