706883domain: NPropertiesPrimalityPrimeyesAppears in sequencesTriangle read by rows: numbers of isomers of unbranched a-4-catapolydecagons.at n=47A120651Numbers of isomers of unbranched a-4-catapolydecagons - see Brunvoll reference for precise definition.at n=7A121144Prime numbersat n=57068