125308domain: NAppears in sequencesa(n) = floor( n*(n-1)*(n-2)*(n-3)/26 ).at n=44A011936Number 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, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 0)}.at n=13A148035a(0) = 0, a(n) = a(n-1)^2 - n.at n=8A153059