10500000000
domain: N
Appears in sequences
- Positive integers n for which n = f(n), where f(n) is the total number of 2's required when writing out all numbers between 0 and n.at n=10A101639
- Numbers k such that the number of times digit 'm' used for writing the decimal representation of the numbers from 1 to k is equal to k for more than one value of m in the range m = 1 to 9.at n=8A216399