159479domain: 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), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=10A149961a(n) = n^5 - n^3 - 2*n^2 + 1.at n=11A177075Semiprimes of the form n^5-n^3-2*n^2+1.at n=3A177087