E.g.f.: sec(tan(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...

A012364

E.g.f.: sec(tan(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+37/4!*x^4+260/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =1a(3) =6a(4) =37a(5) =260a(6) =2317a(7) =24178a(8) =288937a(9) =3858312a(10) =57255609a(11) =933952030a(12) =16622217357a(13) =320373757964

External references