Expansion of e.g.f. tan(x)*tan(tan(x)), even powers only.
A009750
Expansion of e.g.f. tan(x)*tan(tan(x)), even powers only.
Terms
- a(0) =0a(1) =2a(2) =24a(3) =688a(4) =36992a(5) =3234304a(6) =418499584a(7) =75077748736
External references
- oeis: A009750