Write a recursive function in Python:

Write a recursive function that accepts one integer parameter that returns a list with the same number of terms as the value of the parameter. If the parameter is zero or a negative number, return an empty list, ex: triangular(3) rightarrow returns: [1, 3, 6] triangular(5) rightarrow returns: [1, 3, 6, 10, 15] triangular(-2) rightarrow returns: []