199999999999
domain: N
Appears in sequences
- a(n) is the smallest number k such that the letter "N" appears n times when k is written in English.at n=29A060227
- Smallest number whose sum of digits is n^2.at n=10A061104
- a(n) = 2*10^(n-1) - 1.at n=11A067272
- Number of palindromes of length <= n.at n=21A070199
- Minimum number k for which the digital sum of k*n is 10*n.at n=10A147830
- a(1) = 0; a(n+1) is the smallest integer in which the difference between its digits sum and the a(n) digits sum is equal to the n-th prime.at n=9A268605
- Replacing each term of this sequence S with its digit-sum produces a new sequence S' such that S' and S share the same succession of digits.at n=19A302656