2022251

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, 1), (0, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.at n=11A150170
• a(0) = 1 and a(n) = A005169(n) - A005169(n-1).at n=30A289080