n | a(n) |
---|---|
0 | 1 |
1 | 9 |
2 | 99 |
3 | 991 |
4 | 9999 |
5 | 100091 |
6 | 1000001 |
7 | 9999009 |
8 | 100000099 |
9 | 1000009991 |
10 | 10000000001 |
11 | 100000099109 |
12 | 1000000000001 |
13 | 9999999000009 |
14 | 100000000010099 |
15 | 999999990000991 |
16 | 9999999999999999 |
17 | 100000000100100091 |
[1,9,99,991,9999,100091,1000001,9999009,100000099, 1000009991,10000000001,100000099109,1000000000001, 9999999000009,100000000010099,999999990000991, 9999999999999999,100000000100100091] |