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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 19 |
| 3 | 548 |
| 4 | 66749 |
| 5 | 33695574 |
| 6 | 68787981855 |
| 7 | 563088066184424 |
| 8 | 18447871299903970005 |
| 9 | 2417888543453357864445634 |
| 10 | 1267655436282309648681395304255 |
| 11 | 2658458526916981532120588021462151100 |
| 12 | 22300750515466692968838881088968809185127601 |
[1,2,19,548,66749,33695574,68787981855, 563088066184424,18447871299903970005, 2417888543453357864445634, 1267655436282309648681395304255, 2658458526916981532120588021462151100, 22300750515466692968838881088968809185127601] |