The unweighted version of the result generalizes a problem posed by James Propp on enumeration of lozenge tilings of a hexagon of side-lengths 2n , e24e41ee03bc80f7bf53ba74222971c7" title="Click to view the MathML source">2n+3, 2n , e24e41ee03bc80f7bf53ba74222971c7" title="Click to view the MathML source">2n+3, 2n , e24e41ee03bc80f7bf53ba74222971c7" title="Click to view the MathML source">2n+3 (in cyclic order) with the central unit triangles on the (2n+3)-sides removed. Moreover, our result also implies a q-enumeration of boxed plane partitions with certain constraints.
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