-349524

Appears in sequences

• a(n) = -5*a(n-1) - 4*a(n-2), a(0)=1, a(1)=0.at n=10A084240
• a(n) = -a(n-1) + 2*a(n-2), a(0)=1, a(1)=2.at n=20A084247
• Expansion of (1+x-4*x^2) / ((1+x)*(1-4*x^2)).at n=20A087213
• a(n) = (1/3)*(1 - (-2)^n + 3*(-1)^n ) = (-1)^(n+1)*A167030(n).at n=20A167193
• G.f.: x^2*(3+3*x+x^2) / ( (2*x+1) * (1+x) * (1+x+x^2) * (x^2-x+1) ) .at n=19A167617