Expansion of e.g.f.: exp(x)*cosh(x/sqrt(1 - x^2)).
A081440
Expansion of e.g.f.: exp(x)*cosh(x/sqrt(1 - x^2)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =20a(5) =76a(6) =632a(7) =3424a(8) =38096a(9) =265360a(10) =3682592a(11) =31332544a(12) =520705088a(13) =5232870592a(14) =101265169280
External references
- oeis: A081440