71234567domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = numerator of fraction whose decimal representation is (n).(1)(2)(3)...(n-1)(n).at n=6A172495Concatenation of the decimal digits of {n, 1..n}.at n=6A357915Smallest prime number whose decimal digits include the consecutive pattern 1, 2, ..., n.at n=6A392041Prime numbersat n=4186359