-log(cos(tan(x)))=1/2!*x^2+10/4!*x^4+232/6!*x^6+10064/8!*x^8...

A012240

-log(cos(tan(x)))=1/2!*x^2+10/4!*x^4+232/6!*x^6+10064/8!*x^8...

Terms

    a(0) =1a(1) =10a(2) =232a(3) =10064a(4) =720384a(5) =78009600a(6) =11977120768

External references