E.g.f. exp(-x)*cosh(x)/(1-x)^2.

Terms

a(0) =1a(1) =1a(2) =4a(3) =14a(4) =72a(5) =424a(6) =2960a(7) =23568a(8) =211456a(9) =2109056a(10) =23150592a(11) =277315840a(12) =3599704064a(13) =50331030528a(14) =754122723328