E.g.f. tanh(log(1+x))*cosh(x).

Terms

a(0) =0a(1) =1a(2) =-1a(3) =3a(4) =0a(5) =-25a(6) =165a(7) =-623a(8) =392a(9) =18909a(10) =-206685a(11) =1233551a(12) =-1161336a(13) =-81119597a(14) =1241356025a(15) =-10102782675a(16) =12681799920