31500831360domain: NAppears in sequencesarctanh(arcsinh(x)*arcsin(x))=2/2!*x^2+328/6!*x^6+1356192/10!*x^10...at n=3A012606Expansion of e.g.f. log(1 + arcsin(x)*arcsinh(x)) (even powers only).at n=7A296622