Introduction - If you have any usage issues, please Google them yourself
Input line number, print n lines of a triangle formed by the number, triangular as follows 1 1 2 1 1 2 3 2 1 1 2 3 4 3,211,234,543,211,234,565 4 3 2 1 1 2 3 4 5 6 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 1