626913312768domain: NAppears in sequencesNumber of fault-free tilings of a 4 X 3n rectangle with right trominoes.at n=16A084477Product of nonzero digits in n-th row of Pascal's triangle.at n=14A086992Number of labeled marked trees with n nodes.at n=8A136797Expansion of g.f. (1+2*x)/(1-6*x).at n=15A270576