Thread: generate number

Code:

#include<stdio.h>

//main function..
int main(void){
int i,j,k;
int n=3;
        for(i=0;i<=3;i++) {
                j=1;
                while(j<=n) {
                        printf("\t%d",j);
                        j++;
                }
                printf("\n");
                n=n+3;



        }

}

the output is:
1 2 3
1 2 3 4 5 6
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 10 11 12

but i want the output as
1 5
2 6 9
3 7 10 12
4 8 11 13 14 15
anyone help me using the for loop?..