19999999999
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=26A060227
- a(n) = 2*n^n-1.at n=10A062207
- a(n) = 2*10^(n-1) - 1.at n=10A067272
- Number of palindromes of length <= n.at n=19A070199
- a(n+1) is the smallest integer such that the difference between its digital sum and the digital sum of a(n) is n.at n=13A269306