188980domain: NAppears in sequencesNumber of 3Xn 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.at n=13A302151a(n) is the number of unlabeled rank-3 graded lattices with 5 coatoms and n atoms.at n=22A322600