C Language - Generate the following series: 1 1 1 3 5 9 … n.

Q7. WAP to generate the following series: 1 1 1 3 5 9 … n.

#include<stdio.h>
#include<conio.h>
void main()
{
    int n,a=1,b=1,c=1,d=0,i;
    clrscr();
    printf("Enter number: ");
    scanf("%d",&n);
    printf("1");
    printf(" 1");
    printf(" 1);
    for(i=1;i<=n-3;i++)
    {
        d=a+b+c;
        printf(" %d",d);
        a=b;
        b=c;
        c=d;
    }
    getch();
}

Enter number: 10
1 1 1 3 5 9 17 31 57 105