Question: Describe the relation that this predicate defines in PROLOG a(0,0):- !. a(X,Y):- V is X-1, a(V,Z), Y is Z + X NB: Run the codes

Describe the relation that this predicate defines in PROLOG

a(0,0):- !. a(X,Y):- V is X-1, a(V,Z), Y is Z + X

NB: Run the codes to see what the output results that will give a clue of what the predicate does. e,g ?:- a(5,Y). Output: Y=15.

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