read AppsWZmulti:

#Latics paths with steps {[0,2],[2,0],[1,1]}  (same set of steps as Motzkin, but no restiction to be on 
#one part of the diagonal)
#the diagonal is the central trinomial coefficients

LatticePathsStory({[0,2],[2,0],[1,1]},m):


LatticePathsDiagonalStory({[0,2],[2,0],[1,1]},n);
print(`The whole thing took`, time(), `seconds of CPU time `):

quit: