sech(cos(x)*arcsin(x))=1-1/2!*x^2+13/4!*x^4-325/6!*x^6+14873/8!*x^8...

A012492

sech(cos(x)*arcsin(x))=1-1/2!*x^2+13/4!*x^4-325/6!*x^6+14873/8!*x^8...

Terms

    a(0) =1a(1) =-1a(2) =13a(3) =-325a(4) =14873a(5) =-1157705a(6) =123919013a(7) =-19431568013

External references