Number of matchings in the n-barbell graph.
A288841
Number of matchings in the n-barbell graph.
Terms
- a(0) =2a(1) =5a(2) =20a(3) =116a(4) =776a(5) =6452a(6) =59600a(7) =637520a(8) =7448096a(9) =97038416a(10) =1364378432a(11) =20916787520a(12) =342839381120
External references
- oeis: A288841