721592domain: NAppears in sequencesa(n) = a(n-1) + a(n-2) + 1, with a(0) = 0 and a(1) = 8.at n=25A022313Number 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), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.at n=11A149331