0,2
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.
Table of n, a(n) for n=0..4.
Per Hakan Lundow, Enumeration of matchings in polygraphs, 1998.
Sequence in context: A209015 A202634 A030248 * A077728 A093724 A130705
Adjacent sequences: A033532 A033533 A033534 * A033536 A033537 A033538
nonn
Per H. Lundow
approved