Number of D&P Family matchings on n edges.

Terms

a(0) =1a(1) =3a(2) =13a(3) =65a(4) =351a(5) =1994a(6) =11747a(7) =71117a(8) =439765a(9) =2765775a(10) =17636697a(11) =113766694a(12) =741032618a(13) =4867177299a(14) =32199559769a(15) =214369107989