n | a(n) |
---|---|
1 | 21 |
2 | 221 |
3 | 2221 |
4 | 5461 |
5 | 22221 |
6 | 222221 |
7 | 640204 |
8 | 960306 |
9 | 904186 |
10 | 2222221 |
11 | 22222221 |
12 | 58873535 |
13 | 222222221 |
14 | 2222222221 |
15 | 9367217930 |
16 | 6652125007 |
17 | 8419783524 |
18 | 8315731222 |
19 | 9908590176 |
20 | 22222222221 |
21 | 222222222221 |
22 | 483200160032 |
[21,221,2221,5461,22221,222221,640204,960306, 904186,2222221,22222221,58873535,222222221, 2222222221,9367217930,6652125007,8419783524, 8315731222,9908590176,22222222221,222222222221, 483200160032] |