n | a(n) |
---|---|
1 | 0 |
2 | 1 |
3 | 2 |
4 | 3 |
5 | 4 |
6 | 7 |
7 | 10 |
8 | 11 |
9 | 20 |
10 | 100 |
11 | 200 |
12 | 1000 |
13 | 2000 |
14 | 10000 |
15 | 20000 |
16 | 100000 |
17 | 200000 |
18 | 1000000 |
19 | 2000000 |
20 | 10000000 |
21 | 20000000 |
22 | 100000000 |
23 | 200000000 |
24 | 1000000000 |
25 | 2000000000 |
26 | 10000000000 |
27 | 20000000000 |
[0,1,2,3,4,7,10,11,20,100,200,1000,2000,10000, 20000,100000,200000,1000000,2000000,10000000, 20000000,100000000,200000000,1000000000, 2000000000,10000000000,20000000000] |