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| n | a(n) |
|---|---|
| 1 | 18 |
| 2 | 167 |
| 3 | 828 |
| 4 | 2821 |
| 5 | 7582 |
| 6 | 17339 |
| 7 | 35288 |
| 8 | 65769 |
| 9 | 114442 |
| 10 | 188463 |
| 11 | 296660 |
| 12 | 449709 |
| 13 | 660310 |
| 14 | 943363 |
| 15 | 1316144 |
| 16 | 1798481 |
| 17 | 2412930 |
| 18 | 3184951 |
| 19 | 4143084 |
| 20 | 5319125 |
| 21 | 6748302 |
| 22 | 8469451 |
| 23 | 10525192 |
| 24 | 12962105 |
| 25 | 15830906 |
| 26 | 19186623 |
| 27 | 23088772 |
| 28 | 27601533 |
| 29 | 32793926 |
[18,167,828,2821,7582,17339,35288,65769,114442, 188463,296660,449709,660310,943363,1316144, 1798481,2412930,3184951,4143084,5319125,6748302, 8469451,10525192,12962105,15830906,19186623, 23088772,27601533,32793926] |