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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 130 |
| 3 | 2318 |
| 4 | 27216 |
| 5 | 387594 |
| 6 | 5560934 |
| 7 | 70939556 |
| 8 | 876220362 |
| 9 | 10760122935 |
| 10 | 128556693118 |
| 11 | 1491396412267 |
| 12 | 16958961282303 |
| 13 | 189514843653171 |
| 14 | 2079577812522100 |
| 15 | 22430047600047542 |
| 16 | 238222882236692332 |
| 17 | 2493975995373397906 |
| 18 | 25753455308417881148 |
| 19 | 262500213585285366039 |
[1,1,130,2318,27216,387594,5560934,70939556, 876220362,10760122935,128556693118,1491396412267, 16958961282303,189514843653171,2079577812522100, 22430047600047542,238222882236692332, 2493975995373397906,25753455308417881148, 262500213585285366039] |