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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 121 |
| 4 | 2698 |
| 5 | 79654 |
| 6 | 2929238 |
| 7 | 129004633 |
| 8 | 6619919386 |
| 9 | 387904397222 |
| 10 | 25555935470016 |
| 11 | 1869945551975658 |
| 12 | 150459006927310348 |
| 13 | 13203459856456213172 |
| 14 | 1254972882696473807298 |
| 15 | 128439184335788533011489 |
| 16 | 14082139161229781077548346 |
| 17 | 1646731810035799151750487814 |
[1,1,8,121,2698,79654,2929238,129004633, 6619919386,387904397222,25555935470016, 1869945551975658,150459006927310348, 13203459856456213172,1254972882696473807298, 128439184335788533011489, 14082139161229781077548346, 1646731810035799151750487814] |