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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 12 |
| 4 | 46 |
| 5 | 34 |
| 6 | 126 |
| 7 | 2352 |
| 8 | 8844 |
| 9 | 33462 |
| 10 | 25454 |
| 11 | 97240 |
| 12 | 1864356 |
| 13 | 7171892 |
| 14 | 27665596 |
| 15 | 21395520 |
| 16 | 82907640 |
| 17 | 321868854 |
| 18 | 1251661518 |
| 19 | 4874644104 |
| 20 | 19010020260 |
| 21 | 74225053980 |
| 22 | 290134122564 |
| 23 | 1135234789728 |
| 24 | 4446052592904 |
| 25 | 17427428373420 |
[1,5,12,46,34,126,2352,8844,33462,25454,97240, 1864356,7171892,27665596,21395520,82907640, 321868854,1251661518,4874644104,19010020260, 74225053980,290134122564,1135234789728, 4446052592904,17427428373420] |