1,1
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.
Sequence in context: A025290 A184649 A184646 * A157105 A122711 A061332
Adjacent sequences: A028463 A028464 A028465 * A028467 A028468 A028469
nonn
Per Hakan Lundow (phl(AT)theophys.kth.se)