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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 41 |
| 2 | 761 |
| 3 | 13681 |
| 4 | 245521 |
| 5 | 4405721 |
| 6 | 79057481 |
| 7 | 1418628961 |
| 8 | 25456263841 |
| 9 | 456794120201 |
| 10 | 8196837899801 |
| 11 | 147086288076241 |
| 12 | 2639356347472561 |
| 13 | 47361327966429881 |
| 14 | 849864547048265321 |
| 15 | 15250200518902345921 |
| 16 | 273653744793193961281 |
| 17 | 4910517205758588957161 |
| 18 | 88115655958861407267641 |
[1,41,761,13681,245521,4405721,79057481, 1418628961,25456263841,456794120201,8196837899801, 147086288076241,2639356347472561, 47361327966429881,849864547048265321, 15250200518902345921,273653744793193961281, 4910517205758588957161,88115655958861407267641] |