-12640

Appears in sequences

• Expansion of 1 / ((1-x)*(1-x+x^2+x^3)).at n=31A077872
• Expansion of (1-x)^(-1)/(1 + x - x^2 + x^3).at n=17A077902
• Expansion of (1-x)^(-1)/(1+x+x^2-x^3).at n=33A077908