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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 18 |
| 4 | 29 |
| 5 | 39 |
| 6 | 41 |
| 7 | 44 |
| 8 | 69 |
| 9 | 306 |
| 10 | 537 |
| 11 | 1608 |
| 12 | 1667 |
| 13 | 1673 |
| 14 | 4491 |
| 15 | 4934 |
| 16 | 6111 |
| 17 | 12818 |
| 18 | 14078 |
| 19 | 16019 |
| 20 | 23004 |
| 21 | 50996 |
| 22 | 82869 |
[0,2,18,29,39,41,44,69,306,537,1608,1667,1673, 4491,4934,6111,12818,14078,16019,23004,50996, 82869] |