Pascal's triangle: Difference between revisions

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=={{header|Ursala}}==
=={{header|Ursala}}==
Results are calculated using the library function for
combinations, choose.
Zero maps to the empty list. Negatives are inexpressible.
Zero maps to the empty list. Negatives are inexpressible.
This solution uses a library routine for binomial coefficients.
This solution uses a library function for binomial coefficients.
<lang Ursala>#import std
<lang Ursala>#import std
#import nat
#import nat