Given the black body temperature (in Celsius), output the weavelength (in meters) at which the radiation peaks, according to Wien's Displacement Law.
To convert Celsius into Kelvin, use 273.15.
Return the 3n+1 sequence for n
Duplicate each element of a vector.
interesting center of magic matrix
Determine the length of a string of characters
Create an n-by-n null matrix and fill with ones certain positions
Compound interest - number e
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