Strikingly similar to the low-discrepancy sequences used as sampling patterns in modern ray tracers - and quite a similar role, really:
https://en.wikipedia.org/wiki/Halton_sequence
https://books.google.co.uk/books?id=DirOQ_PELlgC&lpg=PA999&o...
https://en.wikipedia.org/wiki/Halton_sequence
https://books.google.co.uk/books?id=DirOQ_PELlgC&lpg=PA999&o...