Expansion of e.g.f.: sin(log(1+log(1+x))).

Terms

a(0) =0a(1) =1a(2) =-2a(3) =6a(4) =-23a(5) =99a(6) =-379a(7) =-262a(8) =43940a(9) =-1040942a(10) =21148764a(11) =-425218324a(12) =8815744554a(13) =-191341725498