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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 155 |
| 4 | 526 |
| 5 | 1509 |
| 6 | 3827 |
| 7 | 8838 |
| 8 | 18969 |
| 9 | 38392 |
| 10 | 74053 |
| 11 | 137204 |
| 12 | 245636 |
| 13 | 426869 |
| 14 | 722624 |
| 15 | 1194983 |
| 16 | 1934737 |
| 17 | 3072530 |
| 18 | 4793530 |
| 19 | 7356497 |
| 20 | 11118274 |
| 21 | 16564901 |
| 22 | 24350745 |
| 23 | 35347252 |
| 24 | 50703161 |
| 25 | 71918276 |
| 26 | 100933171 |
| 27 | 140237506 |
| 28 | 192999960 |
[6,36,155,526,1509,3827,8838,18969,38392,74053, 137204,245636,426869,722624,1194983,1934737, 3072530,4793530,7356497,11118274,16564901, 24350745,35347252,50703161,71918276,100933171, 140237506,192999960] |