sech(tan(x)*sin(x))=1-12/4!*x^4-120/6!*x^6+4368/8!*x^8...

A012374

sech(tan(x)*sin(x))=1-12/4!*x^4-120/6!*x^6+4368/8!*x^8...

Terms

    a(0) =1a(1) =0a(2) =-12a(3) =-120a(4) =4368a(5) =327360a(6) =-762432a(7) =-2379861120a(8) =-176278202112

External references