The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 5 |
| 3 | 9 |
| 4 | 11 |
| 5 | 16 |
| 6 | 20 |
| 7 | 30 |
| 8 | 34 |
| 9 | 200 |
| 10 | 300 |
| 11 | 2000 |
| 12 | 3000 |
| 13 | 20000 |
| 14 | 30000 |
| 15 | 200000 |
| 16 | 300000 |
| 17 | 2000000 |
| 18 | 3000000 |
| 19 | 20000000 |
| 20 | 30000000 |
| 21 | 200000000 |
| 22 | 300000000 |
| 23 | 2000000000 |
| 24 | 3000000000 |
| 25 | 20000000000 |
| 26 | 30000000000 |
[4,5,9,11,16,20,30,34,200,300,2000,3000,20000, 30000,200000,300000,2000000,3000000,20000000, 30000000,200000000,300000000,2000000000, 3000000000,20000000000,30000000000] |