sin(tanh(x)+tan(x))=2*x-8/3!*x^3+64/5!*x^5-2816/7!*x^7+80896/9!*x^9...

A013134

sin(tanh(x)+tan(x))=2*x-8/3!*x^3+64/5!*x^5-2816/7!*x^7+80896/9!*x^9...

Terms

    a(0) =2a(1) =-8a(2) =64a(3) =-2816a(4) =80896a(5) =-7278592a(6) =532070400a(7) =-71008190464

External references