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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 10 |
| 5 | 27 |
| 6 | 104 |
| 7 | 541 |
| 8 | 3498 |
| 9 | 26615 |
| 10 | 231172 |
| 11 | 2250129 |
| 12 | 24227486 |
| 13 | 285705643 |
| 14 | 3660694200 |
| 15 | 50624828357 |
| 16 | 751426146514 |
| 17 | 11913622408671 |
| 18 | 200919532718828 |
| 19 | 3591112295892985 |
| 20 | 67803855263483142 |
| 21 | 1348467602319393299 |
| 22 | 28174602435230023456 |
| 23 | 617001101156944493613 |
| 24 | 14131835969321147283770 |
[2,3,5,10,27,104,541,3498,26615,231172,2250129, 24227486,285705643,3660694200,50624828357, 751426146514,11913622408671,200919532718828, 3591112295892985,67803855263483142, 1348467602319393299,28174602435230023456, 617001101156944493613,14131835969321147283770] |