272700

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 0, 1), (1, 0, -1), (1, 0, 0)}.at n=10A150092
• Number of series-reduced rooted identity trees with n leaves spanning an initial interval of positive integers.at n=6A316653