Number of H&S Family matchings on n edges.

Terms

a(0) =1a(1) =3a(2) =14a(3) =84a(4) =592a(5) =4659a(6) =39699a(7) =359004a(8) =3399164a(9) =33378417a(10) =337584612a(11) =3498553682a(12) =37006524557a(13) =398312230440