Expansion of e.g.f. log(1+tanh(x))/exp(x).

Terms

a(0) =0a(1) =1a(2) =-3a(3) =6a(4) =-8a(5) =5a(6) =-7a(7) =70a(8) =-72a(9) =-1311a(10) =1309a(11) =49214a(12) =-49216a(13) =-2653547a(14) =2653545a(15) =196707438a(16) =-196707440a(17) =-19194804703a(18) =19194804701