Given an odd number n, write a function that creates a matrix y with dimension nxn alternating 1's and 0's, and starting with 1 in the center of the matrix. For example, for n=3 one should get:
y = [0 0 0 ; 0 1 0; 0 0 0]
Sum the 'edge' values of a matrix
Convert yards to feet
Repetition of matrices
Sum of a geometric series
Approximate the inverse tangent by power series
Get the mean digit
Alternate list of elements
Double the next!
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