17. Each day you buy exactly one of the following items: tape (costing $1), a ruler (costing $1), pens (costing $2), pencils (costing $2), paper (costing $2), or a loose-leaf binder (costing $3) Write a recurrence relation and initial conditions for the numbers, of different sequences in which you can spend exactly n dollars, (n > 0). (6 pts)