cosh(arctan(sin(x)))=1+1/2!*x^2-11/4!*x^4+301/6!*x^6-16631/8!*x^8...

A012192

cosh(arctan(sin(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) =1543801a(6) =-216765251a(7) =42924800101

External references