tanh(tan(x)+sin(x))=2*x-15/3!*x^3+449/5!*x^5-28721/7!*x^7...

A012943

tanh(tan(x)+sin(x))=2*x-15/3!*x^3+449/5!*x^5-28721/7!*x^7...

Terms

    a(0) =2a(1) =-15a(2) =449a(3) =-28721a(4) =3151889a(5) =-528627033a(6) =125743579433

External references