On the number of frequency hypercubes $F^n(4;2,2)$

Minjia Shi, Shukai Wang, Xiaoxiao Li +1

A frequency $n$-cube $F^n(4;2,2)$ is an $n$-dimensional $4$-by-...-by-$4$ array filled by $0$s and $1$s such that each line contains exactly two $1$s. We classify the frequency $4$…