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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 47 |
| 4 | 371 |
| 5 | 3676 |
| 6 | 43822 |
| 7 | 610493 |
| 8 | 9730757 |
| 9 | 174624086 |
| 10 | 3483890996 |
| 11 | 76489299307 |
| 12 | 1832590219063 |
| 13 | 47577493251632 |
| 14 | 1330483562569946 |
| 15 | 39870448222541561 |
| 16 | 1274615495706568457 |
| 17 | 43299625736778117418 |
| 18 | 1557589082593773410272 |
| 19 | 59147557572252556858151 |
[1,2,8,47,371,3676,43822,610493,9730757,174624086, 3483890996,76489299307,1832590219063, 47577493251632,1330483562569946,39870448222541561, 1274615495706568457,43299625736778117418, 1557589082593773410272,59147557572252556858151] |