-55040

Appears in sequences

• Expansion of log(1+tan(x))/cos(x).at n=8A009372
• Expansion of (1-x)/(1+2*x-2*x^3).at n=24A078060
• Coefficient of x^n in 1/(n+1) * (1 - 2*x - 2*x^2)^(n+1).at n=12A307969