42201

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, 0, 0), (0, 1, 1), (1, -1, 0), (1, 0, -1), (1, 0, 0)}.at n=8A150608
• a(n) = (15^n - (-3)^n)/18.at n=5A239294