1538292domain: NAppears in sequencesa(n) = Sum_{i=0..n} A047130(i, n-i).at n=22A047131Number 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), (0, 1, -1), (1, 0, 1), (1, 1, -1), (1, 1, 1)}.at n=10A150952