77497domain: NAppears in sequencesA binomial recursion: a(n) = q(n) (see comment).at n=7A132437Number 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, 0), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.at n=9A149471