Write a program using a Scanner that asks the user for a number n between 1 and 9 (inclusive). The program prints a triangle with 2n - 1 rows. The first row contains only the square of 1, and it is right-justified. The second row contains the square of 2 followed by the square of 1, and is right justified. Subsequent rows include the squares of 3, 2, and 1, and then 4, 3, 2 and 1, and so forth until n rows are printed. Starting at row n + 1, the squares between (n - 1) to 1 are printed, again right justified. Row n + 2 prints the squares between (n -2) to 1. Assuming the user enters 4, the program prints the following triangle of 7 rows to the console

•  1 4 1 9 4 1 16 9 4 1 9 4 1 4 1 1