n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 121 |
4 | 144 |
5 | 441 |
6 | 1444 |
7 | 114244 |
8 | 2214144 |
9 | 11142244 |
10 | 121242121 |
11 | 421111441 |
12 | 1111422244 |
13 | 44424414441 |
14 | 111114222244 |
15 | 11111142222244 |
16 | 214222214414224 |
17 | 242441124211441 |
18 | 411244411422244 |
19 | 1111111422222244 |
20 | 2111211444222241 |
[1,4,121,144,441,1444,114244,2214144,11142244, 121242121,421111441,1111422244,44424414441, 111114222244,11111142222244,214222214414224, 242441124211441,411244411422244,1111111422222244, 2111211444222241] |