sec(arcsinh(x)+arcsin(x))=1+4/2!*x^2+80/4!*x^4+4120/6!*x^6...

A013090

sec(arcsinh(x)+arcsin(x))=1+4/2!*x^2+80/4!*x^4+4120/6!*x^6...

Terms

    a(0) =1a(1) =4a(2) =80a(3) =4120a(4) =394880a(5) =61069600a(6) =13845756800

External references