n | a(n) |
---|---|
0 | 0 |
1 | 20 |
2 | 2020 |
3 | 2200 |
4 | 202020 |
5 | 202200 |
6 | 220020 |
7 | 220200 |
8 | 222000 |
9 | 20202020 |
10 | 20202200 |
11 | 20220020 |
12 | 20220200 |
13 | 20222000 |
14 | 22002020 |
15 | 22002200 |
16 | 22020020 |
17 | 22020200 |
18 | 22022000 |
19 | 22200020 |
20 | 22200200 |
21 | 22202000 |
22 | 22220000 |
23 | 2020202020 |
24 | 2020202200 |
[0,20,2020,2200,202020,202200,220020,220200, 222000,20202020,20202200,20220020,20220200, 20222000,22002020,22002200,22020020,22020200, 22022000,22200020,22200200,22202000,22220000, 2020202020,2020202200] |