Expansion of log(1+log(1+x)^2)/2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =5a(5) =10a(6) =-116a(7) =126a(8) =6054a(9) =-68760a(10) =255336a(11) =3099360a(12) =-53045136a(13) =55156608a(14) =10024873104a(15) =-175247246160a(16) =693221858736