81732

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), (1, -1, 0), (1, 1, -1)}.at n=11A148331
• Numbers k such that A173557(k) = A173557(k+1).at n=19A333874