2039543

Appears in sequences

• Number 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, 1, -1), (1, 1, 0)}.at n=11A149474
• G.f. A(x) satisfies A(x) = 1 + x*A(x)*abs( 1/A(x)^2 ).at n=16A380710
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384650.at n=63A384654