sinh(arctan(x)*tan(x))=2/2!*x^2+280/6!*x^6-2688/8!*x^8+774688/10!*x^10...

A012449

sinh(arctan(x)*tan(x))=2/2!*x^2+280/6!*x^6-2688/8!*x^8+774688/10!*x^10...

Terms

    a(0) =2a(1) =0a(2) =280a(3) =-2688a(4) =774688a(5) =-44971520a(6) =12196692352

External references