A033511 Number of matchings in graph P_{8} X P_{n}.

1, 34, 7573, 1222550, 211351945, 36012826776, 6158217253688, 1052091957273408, 179788343101980135, 30721240815429999078, 5249581929453966097649, 897032469743945346623442, 153282416794739031814924079, 26192460807219455656314349664

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..450

Per Hakan Lundow, Computation of matching polynomials and the number of 1-factors in polygraphs, Research report, No 12, 1996, Department of Math., Umea University, Sweden.

Per Hakan Lundow, Enumeration of matchings in polygraphs, 1998.

Sergey Perepechko, Generating function

Crossrefs

Column 8 of triangle A210662.

Bisection (even part) gives A260036.

Sequence in context: A199837 A267916 A005334 * A246240 A273352 A189448

Adjacent sequences: A033508 A033509 A033510 * A033512 A033513 A033514

Keyword

nonn

Author

Per H. Lundow

Status

approved