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

Terms

a(0) =1a(1) =2a(2) =4a(3) =10a(4) =32a(5) =128a(6) =616a(7) =3424a(8) =21632a(9) =152000a(10) =1179904a(11) =9986560a(12) =91734656a(13) =906835712a(14) =9609378304a(15) =108540031744