> You can use more than one LFSR and do clever things by combining the
> values in special ways, incrementing only one LFSR, or using one to
> select how many values to skip in the other, etc.
>
> They are still pseudorandom, though.

Knuth suggests in the Art of Computer Programming that doing clever
things with values of Pseudo random numbers, will make the values less
random! Don't have the book by hand at the moment, but will check the
section when I return home.
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