E.g.f. exp( sinh(x) / exp(x) ) = exp( (1-exp(-2*x))/2 ).

Terms

a(0) =1a(1) =1a(2) =-1a(3) =-1a(4) =9a(5) =-23a(6) =-25a(7) =583a(8) =-3087a(9) =4401a(10) =79087a(11) =-902097a(12) =4783801a(13) =2361049a(14) =-348382697a(15) =4102879415a(16) =-24288551071a(17) =-47413121055