236283domain: NAppears in sequencesA Fielder sequence: a(n) = a(n-1) + a(n-2) + a(n-4).at n=21A001641Number of maximal independent vertex sets (and minimal vertex covers) in the n-wheel graph.at n=41A290612Number of maximal independent vertex sets and minimal vertex covers in the n-trapezohedral graph.at n=21A367644