320230domain: NAppears in sequencesa(n) = n*(n+1)*(n+7)*(122+57*n+n^2)/120.at n=23A101862Number 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, 1, 1), (1, -1, -1), (1, 1, 0)}.at n=10A150151