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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 17 |
| 3 | 233 |
| 4 | 4457 |
| 5 | 109599 |
| 6 | 3294200 |
| 7 | 117023348 |
| 8 | 4796944724 |
| 9 | 222859320409 |
| 10 | 11572143728964 |
| 11 | 664158801170094 |
| 12 | 41748985785588788 |
| 13 | 2852580634624308469 |
| 14 | 210503045435437702457 |
| 15 | 16684642612290860954017 |
| 16 | 1413651317086090261964496 |
| 17 | 127503642994522759923638691 |
| 18 | 12197174216389125259958117521 |
| 19 | 1233478106868364650369933771887 |
[1,2,17,233,4457,109599,3294200,117023348, 4796944724,222859320409,11572143728964, 664158801170094,41748985785588788, 2852580634624308469,210503045435437702457, 16684642612290860954017,1413651317086090261964496, 127503642994522759923638691, 12197174216389125259958117521, 1233478106868364650369933771887] |