I just want to know how many possible top bands are there for normalised solution grids (i.e. lexicographically minimal 81-digit strings). For example two of them are:

- Code: Select all
`123456789`

456789123

789123456

123456789

457189236

689237145

Also, it would be nice to know the rough number of possible top two bands (i.e. r123456). We know the number of possible top three bands must be 5472730538.

Hopefully this can be found without using the complete catalog of solution grids.