n | a(n) |
---|---|
1 | 9 |
2 | 99 |
3 | 333 |
4 | 999 |
5 | 3663 |
6 | 9999 |
7 | 12321 |
8 | 30303 |
9 | 36963 |
10 | 99999 |
11 | 135531 |
12 | 333333 |
13 | 369963 |
14 | 999999 |
15 | 1121211 |
16 | 1367631 |
17 | 3003003 |
18 | 3363633 |
19 | 3699963 |
20 | 9999999 |
21 | 12333321 |
22 | 13688631 |
23 | 33033033 |
24 | 33666633 |
25 | 36999963 |
26 | 99999999 |
27 | 102030201 |
28 | 111111111 |
29 | 124454421 |
30 | 136898631 |
31 | 300030003 |
[9,99,333,999,3663,9999,12321,30303,36963,99999, 135531,333333,369963,999999,1121211,1367631, 3003003,3363633,3699963,9999999,12333321,13688631, 33033033,33666633,36999963,99999999,102030201, 111111111,124454421,136898631,300030003] |