E.g.f.: cos(arctanh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-31/4!*x^4-140/5!*x^5...

A012714

E.g.f.: cos(arctanh(x)*exp(x))=1-1/2!*x^2-6/3!*x^3-31/4!*x^4-140/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =-6a(4) =-31a(5) =-140a(6) =-625a(7) =-2170a(8) =-2623a(9) =96072a(10) =1642975a(11) =23520882a(12) =295668001a(13) =3935469564a(14) =50912723823a(15) =723034935870

External references