1108833

Appears in sequences

• Expansion of tan(tan(x)/cos(x)).at n=4A009708
• 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), (-1, 1, 1), (0, -1, 0), (0, 0, 1), (1, 0, -1)}.at n=13A148322