If your purpose is to compare the efficiency, I recommend you to use tic/toc or timeit instead of clock/etime. The clock function measures the operating system time which is less reliable as compared to tic/toc measurements.
Return the 3n+1 sequence for n
Back to basics 14 - Keywords
Back to basics 25 - Valid variable names
Find the maximum number of decimal places in a set of numbers
Kaggle: Reverse Game of Life - Create Isle prior State
Map all the indices of an Array Indices into a Vector giving Index vs Row and Column
GJam 2011 Africa Qualifier C: House, maximum area rectangle
Image Processing 003: Interferometer Data Interpolation
Slitherlink V: Assert/Evolve/Check (large)
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