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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =-4a(5) =16a(6) =-16a(7) =-104a(8) =-64a(9) =4096a(10) =-256a(11) =-176384a(12) =-1024a(13) =11186176a(14) =-4096a(15) =-951870464a(16) =-16384a(17) =104932704256a(18) =-65536a(20) =-262144a(22) =-1048576a(24) =-4194304a(26) =-16777216