Expansion of e.g.f. exp(tan(arcsin(x))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =4a(4) =13a(5) =76a(6) =421a(7) =3256a(8) =25369a(9) =245008a(10) =2449801a(11) =28441216a(12) =346065061a(13) =4700478784a(14) =67243537453