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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 23 |
| 5 | 51 |
| 6 | 114 |
| 7 | 253 |
| 8 | 559 |
| 9 | 1234 |
| 10 | 2723 |
| 11 | 6007 |
| 12 | 13250 |
| 13 | 29225 |
| 14 | 64459 |
| 15 | 142170 |
| 16 | 313567 |
| 17 | 691595 |
| 18 | 1525362 |
| 19 | 3364293 |
| 20 | 7420183 |
| 21 | 16365730 |
| 22 | 36095755 |
| 23 | 79611695 |
| 24 | 175589122 |
| 25 | 387274001 |
| 26 | 854159699 |
| 27 | 1883908522 |
| 28 | 4155091047 |
| 29 | 9164341795 |
| 30 | 20212592114 |
| 31 | 44580275277 |
| 32 | 98324892351 |
| 33 | 216862376818 |
[1,3,10,23,51,114,253,559,1234,2723,6007,13250, 29225,64459,142170,313567,691595,1525362,3364293, 7420183,16365730,36095755,79611695,175589122, 387274001,854159699,1883908522,4155091047, 9164341795,20212592114,44580275277,98324892351, 216862376818] |