348051

Appears in sequences

• G.f.: M(F(x)) is a power series in x consisting entirely of positive integer coefficients such that M(F(x) - x^k) has negative coefficients for k>0, where M(x) = 1 + x*M(x) + x*M(x)^2 is the g.f. of the Motzkin numbers A001006.at n=37A251571
• Expansion of (1+x-x^2) / (1-x-4*x^2+2*x^3+2*x^4).at n=16A384600