Expansion of e.g.f.: exp(tan(x)-arctan(x))=1+4/3!*x^3-8/5!*x^5+160/6!*x^6+992/7!*x^7...

A013440

Expansion of e.g.f.: exp(tan(x)-arctan(x))=1+4/3!*x^3-8/5!*x^5+160/6!*x^6+992/7!*x^7...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =4a(4) =0a(5) =-8a(6) =160a(7) =992a(8) =-1792a(9) =-14464a(10) =484224a(11) =3391232a(12) =-30840832a(13) =-175044608a(14) =7718963200a(15) =53080130560

External references