-22368256

Appears in sequences

• Expansion of log(1+sin(x)/cosh(x)).at n=14A009342
• Expansion of e.g.f.: log(1+tanh(x)*cos(x)).at n=14A009394
• Expansion of e.g.f. 2*exp(x)*(1-exp(x))/(1+exp(2*x)).at n=13A163747
• Real part of the coefficient [x^n] of the expansion of (1+i)/(1-i*exp(x)) - 1 multiplied by 2*n!, where i is the imaginary unit.at n=13A163982
• a(n) = E2_{n}(0) with E2_{n} the polynomials defined in A326480.at n=12A326481
• Triangle read by rows: T(n, k) = (-1)^(n - k) * binomial(n, k) * A000182(n).at n=28A326723
• a(n) = (PolyLog(-n, -i) - exp(i*Pi*n)*PolyLog(-n, i)) * i / exp(i*Pi*n/2).at n=13A346838
• Product_{n>=1} (1 + x^n)^(a(n)/n!) = 1 + tanh(x).at n=13A354176