526367domain: NPropertiesPrimalityPrimeyesAppears in sequencesSeries for first perpendicular moment of square lattice bond percolation near a wall (eventually goes negative).at n=22A056599a(1) = 1, a(2) = 2 and a(n) = smallest number not included earlier that divides the concatenation a(n-2), a(n-1).at n=46A085946Prime numbersat n=43549