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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 11 |
| 3 | 139 |
| 4 | 2829 |
| 5 | 78981 |
| 6 | 2802163 |
| 7 | 120667667 |
| 8 | 6113752025 |
| 9 | 356342305465 |
| 10 | 23488872131871 |
| 11 | 1727770084512495 |
| 12 | 140302645206245701 |
| 13 | 12466960491079733237 |
| 14 | 1203253101643330233707 |
| 15 | 125351056198801059896491 |
| 16 | 14019427299278115378992049 |
| 17 | 1675439381194882102492648305 |
[1,2,11,139,2829,78981,2802163,120667667, 6113752025,356342305465,23488872131871, 1727770084512495,140302645206245701, 12466960491079733237,1203253101643330233707, 125351056198801059896491, 14019427299278115378992049, 1675439381194882102492648305] |