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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 62 |
| 4 | 631 |
| 5 | 7417 |
| 6 | 104489 |
| 7 | 1648845 |
| 8 | 29319588 |
| 9 | 572982162 |
| 10 | 12250559615 |
| 11 | 283321630605 |
| 12 | 7053444523393 |
| 13 | 187711377451249 |
| 14 | 5317981377046420 |
| 15 | 159652557864884330 |
| 16 | 5061465465801168419 |
| 17 | 168886786171198864725 |
| 18 | 5914650120884760212977 |
| 19 | 216844308186908733542877 |
[1,1,8,62,631,7417,104489,1648845,29319588, 572982162,12250559615,283321630605,7053444523393, 187711377451249,5317981377046420, 159652557864884330,5061465465801168419, 168886786171198864725,5914650120884760212977, 216844308186908733542877] |