Bilayer representation 2 (BR2). Instead of creating a descriptors vector that is double the size of the monolayer descriptor vector, we add the values of the descriptors in both monolayers, effectively averaging them. This method is intrinsically invariant to changes in the order of the monolayers and can be applied to supercells with more than two layers. This generates a data set of 267 records for the prediction of d and 49 records for the prediction of the band gap. Due to the small number of records in BR2 for the band gap prediction, we do not perform machine learning on this set.