list question... unique values in all possible unique spots

[Mensanator]

On Aug 11, 7:34 pm, bearophileH... at lycos.com wrote:
> Mensanator:
>
> > Ever tried to iterate 403 septillion times?
>
> The OP is talking about formulas, like:
> X + Y * Z = W
> Where X, Y, Z, W distinct and in [1, 26], so you have C(26, 4)
> combinations that's way less than 26!
>
> >>> binomial(26, 4)
>
> 14950
>
> So this can be solved with a xcombinations() generator.

How did you surmise it's C(26,4)?

>
> Bye,
> bearophile