looping through possible combinations of McNuggets packs of 6, 9 and 20

[Baba]

Hi Mel,

indeed i thought of generalising the theorem as follows:
If it is possible to buy n, n+1,…, n+(x-1) sets of McNuggets, for some
x, then it is possible to buy any number of McNuggets >= x, given that
McNuggets come in x, y and z packs.

so with diophantine_nuggets(7,10,21) i would need 7 passes
result:53

but with (10,20,30) and 10 passes i get no result

so i'm not sure i'm on the right path...