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]
Project Euler: Problem 10, Sum of Primes
Create a matrix from a cell
Determine the number of odd integers in a vector
Create an index-powered vector
Ratio between sum of primer numbers and non-prime numbers
Double the next!
Approximate the inverse tangent by power series
Sum of a geometric series
Check if is a square
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