Expansion of e.g.f. sec(sinh(x)*tan(x)) (only even powers).
A012552
Expansion of e.g.f. sec(sinh(x)*tan(x)) (only even powers).
Terms
- a(0) =1a(1) =0a(2) =12a(3) =360a(4) =21392a(5) =2157120a(6) =312620352a(7) =62372069760
External references
- oeis: A012552