arctanh(sinh(x)*sin(x)) = 2/2!*x^2+232/6!*x^6+685472/10!*x^10...

A012530

arctanh(sinh(x)*sin(x)) = 2/2!*x^2+232/6!*x^6+685472/10!*x^10...

Terms

    a(0) =2a(1) =232a(2) =685472a(3) =11496925312

External references