A033512 Number of matchings in graph P_{9} X P_{n}.

1, 55, 24342, 7594361, 2548684656, 842518533590, 279533139565077, 92657526436631289, 30721240815429999078, 10185111919160666118608, 3376771882017849561260401, 1119528305492897225312120742, 371166848426649070379972358241, 123056076089539426001744759117065

Offset: 0

Author

Per H. Lundow

Keywords

• nonn

References

• Per Hakan Lundow, "Computation of matching polynomials and the number of 1-factors in polygraphs", Research reports, No 12, 1996, Department of Mathematics, Umea University.

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..400
• Per Hakan Lundow, Enumeration of matchings in polygraphs, 1998.

Crossrefs

Column k=9 of A210662.