159715domain: NAppears in sequencesa(n) = n^4 - 15*n + 15.at n=19A107253Number 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), (-1, 0, -1), (1, 1, 0)}.at n=12A148524