Number of bits:
1 - =
2 + 1 - =
4 + 2 + 1 - =
8 + 4 + 2 + 1 - =
16 + 8 + 4 + 2 + 1 - =
32 + 16 + 8 + 4 + 2 + 1 - =
64 + 32 + 16 + 8 + 4 + 2 + 1 - =
128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 - =