Swap the first and last columns
Determine if a Given Number is a Triangle Number
Get the elements of diagonal and antidiagonal for any m-by-n matrix
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Compute the harmonic numbers
Construct the Seidel-Entringer-Arnold triangle
Evaluate the gamma function
Count numbers whose reciprocals' decimal expansions terminate
Construct a prime circle
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