tanh(sec(x)*arcsinh(x))=x-504/7!*x^7+11904/9!*x^9-1023616/11!*x^11...

A012829

tanh(sec(x)*arcsinh(x))=x-504/7!*x^7+11904/9!*x^9-1023616/11!*x^11...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =-504a(4) =11904a(5) =-1023616a(6) =190103680a(7) =-27296677888

External references