764147domain: 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, 1), (-1, 0, 0), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.at n=11A149295a(n) = Sum_{k=0..n} (-1)^k * binomial(n+2*k+2,n-k) * Fibonacci(k+1).at n=15A390857