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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 11 |
| 5 | 27 |
| 6 | 36 |
| 7 | 84 |
| 8 | 231 |
| 9 | 349 |
| 10 | 535 |
| 11 | 1267 |
| 12 | 2916 |
| 13 | 4114 |
| 14 | 14349 |
| 15 | 27045 |
| 16 | 35059 |
| 17 | 89723 |
| 18 | 234443 |
| 19 | 408129 |
| 20 | 799350 |
| 21 | 1926026 |
| 22 | 2170589 |
| 23 | 4291892 |
| 24 | 10758318 |
| 25 | 21141201 |
| 26 | 57927399 |
| 27 | 122141530 |
| 28 | 138265841 |
[1,3,8,11,27,36,84,231,349,535,1267,2916,4114, 14349,27045,35059,89723,234443,408129,799350, 1926026,2170589,4291892,10758318,21141201, 57927399,122141530,138265841] |