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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 7 |
| 5 | 22 |
| 6 | 70 |
| 7 | 100 |
| 8 | 495 |
| 9 | 1247 |
| 10 | 2072 |
| 11 | 320397 |
| 12 | 3335367 |
| 13 | 16168775 |
| 14 | 37472505 |
| 15 | 52940251 |
| 16 | 78840125 |
| 17 | 81191852 |
[3,4,5,7,22,70,100,495,1247,2072,320397,3335367, 16168775,37472505,52940251,78840125,81191852] |