cos(arctan(x)^2)=1-12/4!*x^4+480/6!*x^6-27888/8!*x^8...

A012460

cos(arctan(x)^2)=1-12/4!*x^4+480/6!*x^6-27888/8!*x^8...

Terms

    a(0) =1a(1) =0a(2) =-12a(3) =480a(4) =-27888a(5) =2353920a(6) =-274245312a(7) =41974872576

External references