Write a function that takes an integer n as a parameter, and computes an n × n multiplication table as a list of lists called H. The value in row r and column c should be the product of r and c. Recall that we always start counting at zero, so when n=2 the rows will be labeled 0 and 1 and the columns will be labeled 0 and 1. For example, when n = 6 you return

[[0,0,0,0,0,0],
[0,1,2,3,4,5],
[0,2,4,6,8,10],
[0,3,6,9,12,15],
[0,4,8,12,16,20],
[0,5,10,15,20,25]]