cos(sec(x)*arcsin(x))=1-1/2!*x^2-15/4!*x^4-345/6!*x^6-11263/8!*x^8...

A012787

cos(sec(x)*arcsin(x))=1-1/2!*x^2-15/4!*x^4-345/6!*x^6-11263/8!*x^8...

Terms

    a(0) =1a(1) =-1a(2) =-15a(3) =-345a(4) =-11263a(5) =-455025a(6) =-16466703a(7) =746021367a(8) =480286325633

External references