2 4 8 16 name July 8, 2019 16 32 64 128 2 4 8 16 sequence name 1 2 4 8 16 sequence name 1 2 4 8 16 name 1 2 4 8 16 series name 1 2 4 8 16 pattern name 2 + 4 + 8 + 16 1 4 9 16 and 25 sequence