-20064

Appears in sequences

• arctan(arctanh(x)*log(x+1))=2/2!*x^2-3/3!*x^3+16/4!*x^4-50/5!*x^5...at n=8A012701
• Triangle of coefficients of Chebyshev polynomials T_{2n+1} (x).at n=47A084930
• Expansion of (1+x)^3/((1+x)^3+x^4).at n=22A099531