Expansion of e.g.f. sin(tan(x)^2) (even powers only).

A009518

Expansion of e.g.f. sin(tan(x)^2) (even powers only).

Terms

    a(0) =0a(1) =2a(2) =16a(3) =152a(4) =-5504a(5) =-1107808a(6) =-155757824a(7) =-22741022848

External references