sec(sin(sinh(x)))=1+1/2!*x^2+5/4!*x^4+13/6!*x^6-1303/8!*x^8...

A012032

sec(sin(sinh(x)))=1+1/2!*x^2+5/4!*x^4+13/6!*x^6-1303/8!*x^8...

Terms

    a(0) =1a(1) =1a(2) =5a(3) =13a(4) =-1303a(5) =-97351a(6) =-5539667a(7) =-182565627a(8) =23677748561

External references