Double Row Facility Layout Problem - 18 Instances with n in {11,12,13}

These are eighteen DRFLP instances with n in {11,12,13}. The instances 12a,12b,13a,13b were introduced in: André R.S. Amaral (2012) The corridor allocation problem, Computers & Operations Research, 39:12, 3325-3330, https://doi.org/10.1016/j.cor.2012.04.016. The remaining instances were introduced in: André R.S. Amaral (2019) A mixed-integer programming formulation for the double row layout of machines in manufacturing systems, International Journal of Production Research, 57:1, 34-47, DOI: 10.1080/00207543.2018.1457811