E.g.f.: cos(tanh(x)+arctan(x))=1-4/2!*x^2+48/4!*x^4-1344/6!*x^6+68096/8!*x^8...

A013145

E.g.f.: cos(tanh(x)+arctan(x))=1-4/2!*x^2+48/4!*x^4-1344/6!*x^6+68096/8!*x^8...

Terms

    a(0) =1a(1) =-4a(2) =48a(3) =-1344a(4) =68096a(5) =-5489024a(6) =649853952a(7) =-106867367936

External references