-138079

Appears in sequences

• Expansion of (1-x)/(1-x+2*x^2-x^3).at n=42A078019
• a(0)=-1, a(1)=0, a(2)=1, a(n) = a(n-1) - 2*a(n-2) + a(n-3).at n=44A141576
• Expansion of x*(1 - x^2)/(1 - x + 7*x^2 + x^3).at n=13A174792