Number of planted identity matched trees with n nodes.

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =24a(5) =95a(6) =388a(7) =1650a(8) =7183a(9) =31965a(10) =144502a(11) =662241a(12) =3068942a(13) =14358678a(14) =67729973a(15) =321759461a(16) =1538076291a(17) =7392775328a(18) =35707198905a(19) =173221206284a(20) =843634142771