arcsinh(sin(x)-sinh(x))=-2/3!*x^3-2/7!*x^7+2240/9!*x^9-2/11!*x^11...

A013374

arcsinh(sin(x)-sinh(x))=-2/3!*x^3-2/7!*x^7+2240/9!*x^9-2/11!*x^11...

Terms

    a(0) =0a(1) =-2a(2) =0a(3) =-2a(4) =2240a(5) =-2a(6) =137280a(7) =-403603202a(8) =10325120a(9) =-223480857602

External references