8939118925domain: NAppears in sequencesNumber of ZnS polytypes that repeat after n layers.at n=40A011957(2^(p-1)-1)/(3*p) where p = prime(n).at n=10A096060Number of 6-elements orbits of S3 action on irreducible polynomials of degree n > 1 over GF(2).at n=39A165921