n | a(n) |
---|---|
1 | 19 |
2 | 91 |
3 | 1199 |
4 | 1919 |
5 | 1991 |
6 | 9119 |
7 | 9191 |
8 | 9911 |
9 | 111999 |
10 | 119199 |
11 | 119919 |
12 | 119991 |
13 | 191199 |
14 | 191919 |
15 | 191991 |
16 | 199119 |
17 | 199191 |
18 | 199911 |
19 | 911199 |
20 | 911919 |
21 | 911991 |
22 | 919119 |
23 | 919191 |
24 | 919911 |
25 | 991119 |
26 | 991191 |
27 | 991911 |
28 | 999111 |
29 | 11119999 |
30 | 11191999 |
[19,91,1199,1919,1991,9119,9191,9911,111999, 119199,119919,119991,191199,191919,191991,199119, 199191,199911,911199,911919,911991,919119,919191, 919911,991119,991191,991911,999111,11119999, 11191999] |