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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 33 |
| 2 | 2177 |
| 3 | 143649 |
| 4 | 9478657 |
| 5 | 625447713 |
| 6 | 41270070401 |
| 7 | 2723199198753 |
| 8 | 179689877047297 |
| 9 | 11856808685922849 |
| 10 | 782369683393860737 |
| 11 | 51624542295308885793 |
| 12 | 3406437421806992601601 |
| 13 | 224773245296966202819873 |
[1,33,2177,143649,9478657,625447713,41270070401, 2723199198753,179689877047297,11856808685922849, 782369683393860737,51624542295308885793, 3406437421806992601601,224773245296966202819873] |