61395989domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of permutations avoiding the patterns {4231, 4321, 35142, 45312, 42513, 45132, 35412, 45213, 43512, 456123, 351624, 451623, 356124}; number of strong sorting class based on 4231.at n=15A111280Prime numbersat n=3639969