The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 13 |
| 4 | 20 |
| 5 | 26 |
| 6 | 73 |
| 7 | 103 |
| 8 | 268 |
| 9 | 383 |
| 10 | 527 |
| 11 | 1748 |
| 12 | 2848 |
| 13 | 4424 |
| 14 | 7933 |
| 15 | 8311 |
| 16 | 9700 |
| 17 | 14872 |
| 18 | 18218 |
| 19 | 31294 |
| 20 | 42032 |
| 21 | 55547 |
| 22 | 111232 |
[2,7,13,20,26,73,103,268,383,527,1748,2848,4424, 7933,8311,9700,14872,18218,31294,42032,55547, 111232] |