cos(arcsin(arcsin(x)))=1-1/2!*x^2-7/4!*x^4-169/6!*x^6-8751/8!*x^8...

A012067

cos(arcsin(arcsin(x)))=1-1/2!*x^2-7/4!*x^4-169/6!*x^6-8751/8!*x^8...

Terms

    a(0) =1a(1) =-1a(2) =-7a(3) =-169a(4) =-8751a(5) =-789681a(6) =-110381943a(7) =-22142611737

External references