Expansion of e.g.f.: 1/(1-tan(sin(x))).

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =32a(5) =177a(6) =1184a(7) =9175a(8) =81280a(9) =810081a(10) =8967168a(11) =109200551a(12) =1450641408a(13) =20876239633a(14) =323542851584