1113059domain: NPropertiesPrimalityPrimeyesAppears in sequencesThe number of hanging vertically stable self-avoiding walks of length n on a 2D square lattice where both the nodes and connecting rods have mass.at n=21A335780Number of (binary) heaps of length n whose element set equals {1,2,3,4}.at n=11A376963Prime numbersat n=86686