E.g.f.: exp(tan(x)-tanh(x))=1+4/3!*x^3+160/6!*x^6+544/7!*x^7+17920/9!*x^9...

A013451

E.g.f.: exp(tan(x)-tanh(x))=1+4/3!*x^3+160/6!*x^6+544/7!*x^7+17920/9!*x^9...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =4a(4) =0a(5) =0a(6) =160a(7) =544a(8) =0a(9) =17920a(10) =261120a(11) =707584a(12) =3942400a(13) =149360640a(14) =1538068480a(15) =5242548224a(16) =111522611200

External references