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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 10 |
| 3 | 127 |
| 4 | 3251 |
| 5 | 138826 |
| 6 | 8853202 |
| 7 | 786297485 |
| 8 | 92660657077 |
| 9 | 13979292051826 |
| 10 | 2626450694785226 |
| 11 | 601179186815081227 |
| 12 | 164665579315045664935 |
| 13 | 53172608709697779630602 |
| 14 | 19988633342014049108880226 |
| 15 | 8653593506915464727302042201 |
| 16 | 4274276964973547062653005905577 |
| 17 | 2389044486666800863650341729928610 |
| 18 | 1500174879893101746801192365463624202 |
[1,2,10,127,3251,138826,8853202,786297485, 92660657077,13979292051826,2626450694785226, 601179186815081227,164665579315045664935, 53172608709697779630602, 19988633342014049108880226, 8653593506915464727302042201, 4274276964973547062653005905577, 2389044486666800863650341729928610, 1500174879893101746801192365463624202] |