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) from Alois P. Heinz, Dec 10 2013
STATUS
approved