16

#include<stdio.h>
main()
{
int i,n,m,j,k=1;
printf("Enter how many elements you want to print : ");
scanf("%d",&n);
printf("\n");
for(i=1;i<=n;i=i+1)
  {
      for(j=1; j<=i; j++)
    {
        printf("%d ", k);
        k=k+2;

    }
    k=1;
    if(i<n)
        printf(" + ");
  }
return 0;
}