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

A009055

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

Terms

    a(0) =1a(1) =-1a(2) =-11a(3) =-253a(4) =-9463a(5) =-491609a(6) =-30257347a(7) =-1480493589a(8) =177416283793

External references