The average number of relatives to 20 generations of grandparents
 

                       You

      2               parents
      4               grandparents
      8               ggrandparents
      16             gggrandparents
      32             ggggrandparents
      64             gggggrandparents
      128           ggggggrandparents
      256           gggggggrandparents
      512           ggggggggrandparents
      1,024        gggggggggrandparents
      2,048        ggggggggggrandparents
      4,096        gggggggggggrandparents
      8,192        ggggggggggggrandparents
      16,384      gggggggggggggrandparents
      32,768      ggggggggggggggrandparents
      65,536      gggggggggggggggrandparents
      131,072    ggggggggggggggggrandparents
      262,144    gggggggggggggggggrandparents
      524,288    ggggggggggggggggggrandparents
     1,048,576  gggggggggggggggggggrandparents
     2,097,152  ggggggggggggggggggggrandparents
     4,194,304  gggggggggggggggggggggrandparents
      =================================================
      8,388,606 Ancestors to 20 Great Grandparents
 

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