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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 7 |
| 3 | 52 |
| 4 | 59 |
| 5 | 229 |
| 6 | 975 |
| 7 | 1204 |
| 8 | 2179 |
| 9 | 3383 |
| 10 | 39392 |
| 11 | 42775 |
| 12 | 82167 |
| 13 | 124942 |
| 14 | 581935 |
| 15 | 1870747 |
| 16 | 2452682 |
| 17 | 19039521 |
| 18 | 40531724 |
| 19 | 140634693 |
| 20 | 3415764356 |
| 21 | 10387927761 |
| 22 | 24191619878 |
| 23 | 179729266907 |
| 24 | 203920886785 |
| 25 | 791491927262 |
[1,3,7,52,59,229,975,1204,2179,3383,39392,42775, 82167,124942,581935,1870747,2452682,19039521, 40531724,140634693,3415764356,10387927761, 24191619878,179729266907,203920886785, 791491927262] |