\BOOKMARK [1][-]{section.1}{Introduction}{}% 1
\BOOKMARK [1][-]{section.2}{Coverings of 2 n boards with squares, dominoes, and trominoes}{}% 2
\BOOKMARK [1][-]{section.3}{A recurrence relation for 3n boards}{}% 3
\BOOKMARK [1][-]{section.4}{Tilings of mn boards using transfer matrices}{}% 4
\BOOKMARK [2][-]{subsection.4.1}{Recursive construction of the transfer matrix}{section.4}% 5
\BOOKMARK [2][-]{subsection.4.2}{Enumeration using the transfer matrix}{section.4}% 6
\BOOKMARK [1][-]{section.5}{Conclusion}{}% 7