Expansion of tan(x)*cos(log(1+x)).

Terms

a(0) =0a(1) =1a(2) =0a(3) =-1a(4) =12a(5) =-54a(6) =360a(7) =-2094a(8) =15568a(9) =-113516a(10) =979200a(11) =-8587668a(12) =84989520a(13) =-863430840a(14) =9562970144a(15) =-108058865368