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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 8 |
| 3 | 18 |
| 4 | 21 |
| 5 | 69 |
| 6 | 84 |
| 7 | 181 |
| 8 | 216 |
| 9 | 461 |
| 10 | 642 |
| 11 | 672 |
| 12 | 2413 |
| 13 | 3681 |
| 14 | 5666 |
| 15 | 12281 |
| 16 | 14949 |
| 17 | 19508 |
| 18 | 27817 |
| 19 | 34061 |
| 20 | 43236 |
| 21 | 43733 |
| 22 | 81828 |
[5,8,18,21,69,84,181,216,461,642,672,2413,3681, 5666,12281,14949,19508,27817,34061,43236,43733, 81828] |