216201

Appears in sequences

• Expansion of (1-x)^(-1)/(1+2*x+2*x^2-x^3).at n=24A077933
• G.f.: (1-x)*(1-x-2*x^2-sqrt(1-2*x-3*x^2))/(2*x*(1-2*x-x^2)).at n=14A234270