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

Terms

a(0) =0a(1) =1a(2) =-1a(3) =-1a(4) =8a(5) =-14a(6) =-46a(7) =314a(8) =48a(9) =-7244a(10) =13484a(11) =233804a(12) =-1002112a(13) =-10692824a(14) =79853864a(15) =661278344a(16) =-7758425472a(17) =-52788251504a(18) =928828095344