248346domain: NAppears in sequencesNumber of free subsets of multiplicative group of GF(2^n).at n=18A007230a(n) = 10 + floor(Sum_{j=1..n-1} a(j) / 2).at n=25A120138Number of subsets of {1..n} containing n whose mean is not an element.at n=19A327477a(n) = floor(n*2^n/(n + 1)).at n=18A350294