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A028458
Number of perfect matchings in graph P_{2} X C_{6} X P_{n}.
1
1, 20, 3108, 297296, 31937617, 3350337360, 353544256465, 37264079953664, 3928877032323636, 414211112701109036, 43669866502128209569, 4604058193083952217472, 485400369515158307543761, 51175176191003066916312572, 5395337413785403025694582228
OFFSET
0,2
REFERENCES
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.
LINKS
CROSSREFS
Sequence in context: A222750 A250019 A145405 * A225989 A332265 A177323
KEYWORD
nonn
AUTHOR
STATUS
approved