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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 138 |
| 6 | 143 |
| 7 | 2426 |
| 8 | 1625563 |
| 9 | 14632493 |
| 10 | 45523042 |
| 11 | 105678577 |
| 12 | 151201619 |
| 13 | 2071299624 |
| 14 | 2222501243 |
| 15 | 10961304596 |
| 16 | 13183805839 |
| 17 | 24145110435 |
| 18 | 37328916274 |
| 19 | 248118608079 |
| 20 | 285447524353 |
| 21 | 3388041375962 |
| 22 | 7061530276277 |
| 23 | 10449571652239 |
| 24 | 27960673580755 |
[1,2,3,5,138,143,2426,1625563,14632493,45523042, 105678577,151201619,2071299624,2222501243, 10961304596,13183805839,24145110435,37328916274, 248118608079,285447524353,3388041375962, 7061530276277,10449571652239,27960673580755] |