752587domain: NAppears in sequencesNumber of (1,0)-steps at level 0 in all weighted lattice paths in L_n.at n=15A182895G.f. satisfies: A(x) = Sum_{n>=0} n^n * x^n * A(x)^n / (1 + n*x*A(x))^n.at n=8A222012Expansion of x^2*(1+x^2) / ( (x^2-x+1)*(-x^2-x+1)*(1+x+x^2) ).at n=31A227047