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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 64 |
| 4 | 679 |
| 5 | 8468 |
| 6 | 126784 |
| 7 | 2238565 |
| 8 | 45605124 |
| 9 | 1053117974 |
| 10 | 27182818156 |
| 11 | 775557529509 |
| 12 | 24236473829015 |
| 13 | 823299898542083 |
| 14 | 30205566231626957 |
| 15 | 1190319005015526817 |
| 16 | 50143449209799256306 |
| 17 | 2248672171655330927835 |
[1,1,6,64,679,8468,126784,2238565,45605124, 1053117974,27182818156,775557529509, 24236473829015,823299898542083,30205566231626957, 1190319005015526817,50143449209799256306, 2248672171655330927835] |