191796domain: NAppears in sequencesNumber 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), (-1, 1, 0), (1, -1, -1), (1, 0, 0)}.at n=12A148517a(n) = Sum_{k=1..n} k * sigma_3(k).at n=14A356126