n | a(n) |
---|---|
0 | 0 |
1 | 9 |
2 | 90 |
3 | 99 |
4 | 900 |
5 | 909 |
6 | 990 |
7 | 999 |
8 | 9000 |
9 | 9009 |
10 | 9090 |
11 | 9099 |
12 | 9900 |
13 | 9909 |
14 | 9990 |
15 | 9999 |
16 | 90000 |
17 | 90009 |
18 | 90090 |
19 | 90099 |
20 | 90900 |
21 | 90909 |
22 | 90990 |
23 | 90999 |
24 | 99000 |
25 | 99009 |
26 | 99090 |
27 | 99099 |
28 | 99900 |
29 | 99909 |
30 | 99990 |
31 | 99999 |
32 | 900000 |
33 | 900009 |
34 | 900090 |
35 | 900099 |
36 | 900900 |
[0,9,90,99,900,909,990,999,9000,9009,9090,9099, 9900,9909,9990,9999,90000,90009,90090,90099,90900, 90909,90990,90999,99000,99009,99090,99099,99900, 99909,99990,99999,900000,900009,900090,900099, 900900] |