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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 58 |
| 2 | 4888 |
| 3 | 363288 |
| 4 | 24047406 |
| 5 | 1482656786 |
| 6 | 87401659166 |
| 7 | 4997438572618 |
| 8 | 279544493456056 |
| 9 | 15382405126365576 |
| 10 | 835737977869494888 |
| 11 | 44947274043643171988 |
| 12 | 2397349106561086277820 |
| 13 | 126986150948361831547964 |
| 14 | 6687136917574958175921116 |
| 15 | 350384258762032443770716600 |
[2,58,4888,363288,24047406,1482656786,87401659166, 4997438572618,279544493456056,15382405126365576, 835737977869494888,44947274043643171988, 2397349106561086277820,126986150948361831547964, 6687136917574958175921116, 350384258762032443770716600] |