124458617domain: NAppears in sequencesNumbers m such that m' = d_1^k + d_2^(k-1) + ... + d_k^1 where d_1, d_2, ..., d_k are the digits of m, with MSD(m) = d_1 and LSD(m) = d_k, and m' is the arithmetic derivative of m.at n=23A284813