80689

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), (-1, -1, 0), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.at n=12A148090
• Expansion of e.g.f. 1 / (1 + log(1 - 4*x))^(1/4).at n=5A367426
• One-fourth of the total number of edges in the graph (see A392172) formed when n points are placed in general position on each edge of a square and a chord is drawn from each point to the 3*n points on the other three sides.at n=12A392174