Expansion of tanh(log(1+x))*log(1+x)/2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =7a(5) =-10a(6) =-18a(7) =168a(8) =360a(9) =-19008a(10) =262080a(11) =-2724480a(12) =25194240a(13) =-232951680a(14) =2505444480a(15) =-34676812800a(16) =577980748800