C program to print the following pattern : 1 2 6 3 7 10 4 8 11 13 5 9 12 14 15

C program to print the following pattern :

1

2 6

3 7 10

4 8 11 13

5 9 12 14 15

#include<stdio.h>
int main()
 { int n,i,j;
printf("Enter n\n");
scanf("%d",&n);
for(i=0;i<=n-1;i++)
{
for(j=0;j<=i;j++)
{
printf("%d ",(((2*n-1-j)*j)/2)+(i+1));
}
printf("\n"); }
 }