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]
Maximum running product for a string of numbers
Set some matrix elements to zero
Pi Estimate 1
Generate a string like abbcccddddeeeee
sum of first 'n' terms
Get the mean digit
Check if is a square
Ratio between sum of primes and sum of factors
Say type of roots in quadratic equation
Approximate the inverse tangent by power series
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