Let's calculate. I have a pair parents, 2 pairs grandparents, 4 pairs of great grandparents, 8 pairs great-great grandparents, and 16 pairs great-great-great gr

Let's calculate. I have a pair parents, 2 pairs grandparents, 4 pairs of great grandparents, 8 pairs great-great grandparents, and 16 pairs great-great-great grandparents. How to estimate the number of fourth cousins?