Number of near-matchings on the complete graph over 2n+1 vertices.

A200142

Number of near-matchings on the complete graph over 2n+1 vertices.

Terms

    a(0) =3a(1) =30a(2) =315a(3) =3780a(4) =51975a(5) =810810a(6) =14189175a(7) =275675400a(8) =5892561675a(9) =137493105750

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