500
Barb is making a bead necklace. She strings 1 white bead, then 3 blue beads, then 1 white bead, and so on. Write the term numbers for the first eight beads that are white. What is the rule for this pattern?
What are 1, 5, 9, 13, 17, 21, 25, 29?
What is add 4?