Pascals triangle

Enter Size = 7
      1
     1 1
    1 2 1
   1 3 3 1
  1 4 6 4 1
 1 5 10 10 5 1
1 6 15 20 15 6 1

#include<stdio.h>
int main()
{
	int i,n,j,k;
	printf("Enter Size = ");
	scanf("%d",&n);
	for(i = 1 ; i <=n;i++)
	{
		k = 1;
		for(j=n;j>i;j--)
			printf(" ");
		for(j = 1;j<=i;j++)
		{
			printf("%d ",k);
			k = k*(i-j)/j;
		}
		printf("\n");
	}
}