Project Euler: Problem 6, Natural numbers, squares and sums.
Scoring for oriented dominoes
Doubling elements in a vector
Detect a number and replace with two NaN's
select the primes of a vector
Duplicate each element of a vector.
Find the elements of a matrix according to a defined property.
Matrix which contains the values of an other matrix A at the given locations.
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
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