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A128684 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 111 |
| 4 | 24753 |
| 5 | 1770231 |
| 6 | 23401797 |
| 7 | 39402669 |
| 8 | 65498547 |
| 9 | 298100379 |
| 10 | 440377293 |
| 11 | 1788478509 |
| 12 | 5218600731 |
| 13 | 8786795187 |
| 14 | 14606175981 |
| 15 | 24342867543 |
| 16 | 45340639419 |
| 17 | 98204136339 |
| 18 | 5032808252679 |
| 19 | 5293823142513 |
| 20 | 6241891310439 |
| 21 | 7013907181779 |
[1,3,111,24753,1770231,23401797,39402669,65498547, 298100379,440377293,1788478509,5218600731, 8786795187,14606175981,24342867543,45340639419, 98204136339,5032808252679,5293823142513, 6241891310439,7013907181779] |