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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =0a(4) =2a(5) =-4a(6) =8a(7) =-24a(8) =16a(9) =272a(10) =-2304a(11) =14528a(12) =-68352a(13) =181312a(14) =843776a(15) =-20265088a(16) =221382656a(17) =-1771263744a(18) =9865887744a(19) =-4388386816a(20) =-888186732544