-12237

Appears in sequences

• Expansion of (1-x) / (1+x^2+2*x^3).at n=28A078033
• a(n+3) = 2a(n+2) - 3a(n+1) + 2a(n); a(0) = 1, a(1) = 1, a(2) = 0.at n=29A105578
• Expansion of (1-x)*(2*x^2+2*x+1) / ((x^2-x-1)*(x^2+x+1)).at n=20A111734