arcsinh(sec(x)*sinh(x))=x+3/3!*x^3+5/5!*x^5-217/7!*x^7+2505/9!*x^9...

A012817

arcsinh(sec(x)*sinh(x))=x+3/3!*x^3+5/5!*x^5-217/7!*x^7+2505/9!*x^9...

Terms

    a(0) =1a(1) =3a(2) =5a(3) =-217a(4) =2505a(5) =765963a(6) =-6838195a(7) =-9335128657a(8) =286658869905

External references