using System;
class Program
{
static void Main()
{
int n = 5;
for (int i = 0; i < n; i++) {
int number = 1;
for (int j = 0; j < (n - i) * 2; j++)
Console.Write(" ");
for (int j = 0; j <= i; j++) {
Console.Write("{0, 4}", number);
number = number * (i - j) / (j + 1);
}
Console.WriteLine();
}
}
}
/*
run:
1
1 1
1 2 1
1 3 3 1
1 4 6 4 1
*/