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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 7 |
| 3 | 11 |
| 4 | 13 |
| 5 | 14 |
| 6 | 20 |
| 7 | 37 |
| 8 | 53 |
| 9 | 71 |
| 10 | 132 |
| 11 | 140 |
| 12 | 613 |
| 13 | 641 |
| 14 | 665 |
| 15 | 757 |
| 16 | 788 |
| 17 | 1878 |
| 18 | 6774 |
| 19 | 8777 |
| 20 | 14575 |
| 21 | 20917 |
| 22 | 22352 |
| 23 | 35828 |
[2,7,11,13,14,20,37,53,71,132,140,613,641,665,757, 788,1878,6774,8777,14575,20917,22352,35828] |