E.g.f. sinh(log(1+x)^2).

Terms

a(0) =0a(1) =0a(2) =2a(3) =-6a(4) =22a(5) =-100a(6) =668a(7) =-6048a(8) =64776a(9) =-763488a(10) =9676152a(11) =-131167080a(12) =1900043880a(13) =-29387788560a(14) =484545133200