152079domain: 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, 0, 1), (-1, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.at n=10A149015Expansion of Product_{k>=1} 1/(1 - x^k)^(3*k*(k-1)/2+1).at n=13A295179