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

A013496

Expansion of e.g.f.: exp(tanh(x)-arctanh(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) =-50304a(10) =484224a(11) =-4573952a(12) =38725632a(13) =-738222080a(14) =8292976640a(15) =-127954033664

External references