47978domain: NAppears in sequences[ exp(4/23)*n! ].at n=7A030825Number 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, 1, 0), (1, 0, 0), (1, 1, -1)}.at n=9A149966a(n) = Sum_{k=0..n} 3^(n-k) * binomial(n+4,k+4) * binomial(2*k+8,k+8).at n=4A387277