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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 14 |
| 6 | 42 |
| 7 | 3810 |
| 8 | 26670 |
| 9 | 34162 |
| 10 | 41256 |
| 11 | 48546 |
| 12 | 87096 |
| 13 | 102486 |
| 14 | 131934 |
| 15 | 210482 |
| 16 | 288792 |
| 17 | 315723 |
| 18 | 318990 |
| 19 | 430122 |
| 20 | 529848 |
| 21 | 609672 |
| 22 | 631446 |
| 23 | 979830 |
| 24 | 1023366 |
| 25 | 1203960 |
| 26 | 1473374 |
| 27 | 1683126 |
| 28 | 1920699 |
| 29 | 2210061 |
| 30 | 2241934 |
| 31 | 2506086 |
| 32 | 2549610 |
[1,2,3,6,14,42,3810,26670,34162,41256,48546,87096, 102486,131934,210482,288792,315723,318990,430122, 529848,609672,631446,979830,1023366,1203960, 1473374,1683126,1920699,2210061,2241934,2506086, 2549610] |