cos(sinh(x)*arctan(x))=1-12/4!*x^4+120/6!*x^6-5040/8!*x^8...

A012559

cos(sinh(x)*arctan(x))=1-12/4!*x^4+120/6!*x^6-5040/8!*x^8...

Terms

    a(0) =1a(1) =0a(2) =-12a(3) =120a(4) =-5040a(5) =398400a(6) =-42267456a(7) =6511220352

External references