sec(tan(x)*tan(x))=1+12/4!*x^4+480/6!*x^6+32592/8!*x^8...
A012394
sec(tan(x)*tan(x))=1+12/4!*x^4+480/6!*x^6+32592/8!*x^8...
Terms
- a(0) =1a(1) =0a(2) =12a(3) =480a(4) =32592a(5) =3644160a(6) =601225152a(7) =136477985280
External references
- oeis: A012394