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

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =20a(5) =81a(6) =438a(7) =2477a(8) =16680a(9) =120481a(10) =973034a(11) =8496245a(12) =80252732a(13) =817734321a(14) =8859646110a(15) =102873611549