Integers m such that m' = Sum_{i=1..k-1} (Sum_{j=1..i} d_(k-j+1)*10^(i-j))', where m' is the arithmetic derivative of m and the digits of m are given by d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + ... + d_(2)*10 + d_(1).

A244077

Integers m such that m' = Sum_{i=1..k-1} (Sum_{j=1..i} d_(k-j+1)*10^(i-j))', where m' is the arithmetic derivative of m and the digits of m are given by d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + ... + d_(2)*10 + d_(1).