  J. Propp and T. Roby isolated a phenomenon in which a statistic on a set has
the same average value over any orbit as its global average, naming it
homomesy. They proved that the cardinality statistic on order ideals of the
product of two chains poset under rowmotion exhibits homomesy. In this paper,
we prove an analogous result in the case of the product of three chains where
one chain has two elements. In order to prove this result, we generalize from
two to $n$ dimensions the recombination technique that D. Einstein and Propp
developed to study homomesy. We see that our main homomesy result does not
fully generalize to an arbitrary product of three chains, nor to larger
products of chains; however, we have a partial generalization to an arbitrary
product of three chains. Additional corollaries include refined homomesy
results in the product of three chains and a new result on increasing tableaux.
We conclude with a generalization of recombination to any ranked poset and a
homomesy result for the Type B minuscule poset cross a two element chain.
