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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 14 |
| 5 | 47 |
| 6 | 222 |
| 7 | 319 |
| 8 | 2132 |
| 9 | 5637 |
| 10 | 16270 |
| 11 | 20417 |
| 12 | 217284 |
| 13 | 263111 |
| 14 | 3323194 |
| 15 | 3920925 |
| 16 | 764392 |
| 17 | 1768477 |
| 18 | 29382138 |
| 19 | 33464927 |
| 20 | 622740028 |
| 21 | 3502177707 |
| 22 | 3436155514 |
| 23 | 3825136961 |
| 24 | 86449058184 |
| 25 | 95405331155 |
| 26 | 469336577606 |
[1,1,5,14,47,222,319,2132,5637,16270,20417,217284, 263111,3323194,3920925,764392,1768477,29382138, 33464927,622740028,3502177707,3436155514, 3825136961,86449058184,95405331155,469336577606] |