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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 10 |
| 6 | 23 |
| 7 | 42 |
| 8 | 110 |
| 9 | 286 |
| 10 | 749 |
| 11 | 2059 |
| 12 | 7097 |
| 13 | 19279 |
| 14 | 68211 |
| 15 | 246724 |
| 16 | 885790 |
| 17 | 3234668 |
| 18 | 14549030 |
| 19 | 53401041 |
| 20 | 240993489 |
| 21 | 1111160746 |
| 22 | 5080272010 |
| 23 | 23413163247 |
| 24 | 129102470025 |
| 25 | 599218203979 |
| 26 | 3297343887195 |
| 27 | 18468781315851 |
| 28 | 102681863426893 |
| 29 | 573393298022342 |
[1,2,3,5,10,23,42,110,286,749,2059,7097,19279, 68211,246724,885790,3234668,14549030,53401041, 240993489,1111160746,5080272010,23413163247, 129102470025,599218203979,3297343887195, 18468781315851,102681863426893,573393298022342] |