667178domain: NAppears in sequencesNumber of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=8A318011Number of subsets of {1,2,...,n} such that no two elements differ by 1, 2, or 5.at n=37A375980