Expansion of e.g.f. cos(tan(sinh(x))), even terms only.

A009067

Expansion of e.g.f. cos(tan(sinh(x))), even terms only.

Terms

    a(0) =1a(1) =-1a(2) =-11a(3) =-253a(4) =-9911a(5) =-567449a(6) =-42551299a(7) =-3661191381a(8) =-252072060911

External references