Number of R&G Family matchings on n edges.

Terms

a(0) =1a(1) =3a(2) =13a(3) =61a(4) =301a(5) =1552a(6) =8277a(7) =45284a(8) =252753a(9) =1433633a(10) =8239993a(11) =47887467a(12) =280927846a(13) =1661387046a(14) =9894376821a(15) =59288650788a(16) =357198545904