S. A. Wahid  , 
    On Matching Polynomials of a Simple Hexagonal Lattice,
    Asian Journal of Information Technology,
    Volume 5,Issue 1,
    2006,
    Pages 20-23,
    ISSN 1682-3915,
    ajit.2006.20.23,
    (https://makhillpublications.co/view-article.php?doi=ajit.2006.20.23)
    Abstract: A recurrence relation is derived for the matching polynomial of a 2 x n hexagonal lattice.Explicit formulae are then obtained for the first ten and the final four coefficients.
    Keywords: Polynomial;hexagonal lattice;coefficients