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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 11 |
| 4 | 124 |
| 5 | 2870 |
| 6 | 133462 |
| 7 | 12477207 |
| 8 | 2344649612 |
| 9 | 885591183971 |
| 10 | 672331353833716 |
| 11 | 1025954712063362545 |
| 12 | 3146790000180780110540 |
| 13 | 19400015532276248131470280 |
| 14 | 240398159948843792847457589388 |
| 15 | 5987629866666297470033540284817068 |
| 16 | 299759874416459708067727376075503706332 |
[1,1,2,11,124,2870,133462,12477207,2344649612, 885591183971,672331353833716,1025954712063362545, 3146790000180780110540,19400015532276248131470280, 240398159948843792847457589388, 5987629866666297470033540284817068, 299759874416459708067727376075503706332] |