-2149

Appears in sequences

• Expansion of e.g.f.: tanh(tan(x)/cos(x)).at n=3A009818
• E.g.f.: exp(sin(x)-log(x+1)).at n=7A013341
• a(0) = -1 and a(n) = (-1)^(n+1)*(3*n^2 - n + 4)/2 for n >= 1.at n=38A173247
• Coefficients in the power series expansion of A(x) = Sum_{n=-oo..+oo} n * x^n * (1 - x^n)^(n-2).at n=49A356774