-18560

Appears in sequences

• Expansion of 1/(1+2*x^2+2*x^3).at n=21A077968
• Expansion of (1 - x)/(1 + x - 2*x^2 + x^3).at n=13A078039
• Expansion of x^3 / ( 1+2*x^2+2*x^3 ).at n=23A123958
• G.f.: 1/(1+x+x^3).at n=27A199804