76723domain: NAppears in sequencesNumber of strict first-order maximal independent sets in cycle graph.at n=39A007391Partial sum of Perrin numbers.at n=35A193744Number of 4Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically.at n=9A207271a(n) = 2^n - 1 written backwards.at n=15A273092