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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 149 |
| 4 | 471 |
| 5 | 1240 |
| 6 | 2884 |
| 7 | 6159 |
| 8 | 12371 |
| 9 | 23716 |
| 10 | 43790 |
| 11 | 78342 |
| 12 | 136368 |
| 13 | 231677 |
| 14 | 385101 |
| 15 | 627571 |
| 16 | 1004341 |
| 17 | 1580713 |
| 18 | 2449699 |
| 19 | 3742152 |
| 20 | 5640008 |
| 21 | 8393406 |
| 22 | 12342594 |
| 23 | 17945687 |
| 24 | 25813519 |
| 25 | 36753026 |
| 26 | 51820812 |
| 27 | 72388786 |
| 28 | 100224016 |
| 29 | 137585227 |
[6,36,149,471,1240,2884,6159,12371,23716,43790, 78342,136368,231677,385101,627571,1004341,1580713, 2449699,3742152,5640008,8393406,12342594,17945687, 25813519,36753026,51820812,72388786,100224016, 137585227] |