Expansion of e.g.f. sec(sec(x)*log(x+1)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =-3a(4) =28a(5) =-160a(6) =1630a(7) =-14700a(8) =180668a(9) =-2227608a(10) =32850740a(11) =-507842060a(12) =8829277928a(13) =-162974579040