283392

Appears in sequences

• arctan(arctanh(x)*arctan(x))=2/2!*x^2-32/6!*x^6+283392/10!*x^10...at n=2A012731
• Triangle T(n,k), 0<=k<=n, read by rows, defined by Sum_{k = 0..n} T(n,k)*x^k = Sum_{k = 0..n} binomial(n,k)*(x+k)^n.at n=22A095677
• Expansion of 1/sqrt(1 - 4*x - 12*x^2).at n=8A098453
• Constants r_n arising in study of polynomials of least deviation from zero in several variables.at n=3A210627