cos(arcsin(tan(x)))=1-1/2!*x^2-11/4!*x^4-301/6!*x^6-16631/8!*x^8...

A012079

cos(arcsin(tan(x)))=1-1/2!*x^2-11/4!*x^4-301/6!*x^6-16631/8!*x^8...

Terms

    a(0) =1a(1) =-1a(2) =-11a(3) =-301a(4) =-16631a(5) =-1620601a(6) =-250557251a(7) =-56629836901

External references