201023

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, 0, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.at n=10A149966
• a(n) is the least positive integer k such that Mordell's equation y^2 = x^3 - k has exactly n integer solutions with y >= 0.at n=16A392395