Expansion of e.g.f. exp(arctanh(x)*tan(x)) (even powers only).
A012725
Expansion of e.g.f. exp(arctanh(x)*tan(x)) (even powers only).
Terms
- a(0) =1a(1) =2a(2) =28a(3) =920a(4) =54416a(5) =5056288a(6) =678865856a(7) =124425704832
External references
- oeis: A012725