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

Terms

a(0) =0a(1) =0a(2) =1a(3) =-3a(4) =7a(5) =-20a(6) =102a(7) =-658a(8) =4364a(9) =-32736a(10) =293760a(11) =-2954512a(12) =31998048a(13) =-377807040a(14) =4885788992a(15) =-68173993856