60668

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, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1)}.at n=9A150012
• Expansion of 1/( (1 + x)^2 * (1 - x^2*(1 + x)^2) ).at n=27A375373