cos(arcsinh(x)*arcsin(x))=1-12/4!*x^4-3248/8!*x^8-19157952/12!*x^12...

A012603

cos(arcsinh(x)*arcsin(x))=1-12/4!*x^4-3248/8!*x^8-19157952/12!*x^12...

Terms

    a(0) =1a(1) =-12a(2) =-3248a(3) =-19157952a(4) =-518516045568

External references