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
Per Hakan Lundow, Enumeration of matchings in polygraphs, 1998.
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
a(8)-a(9) from Alois P. Heinz, Dec 10 2013
STATUS
approved