| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 19 |
| 5 | 361 |
| 6 | 307 |
| 7 | 24611 |
| 8 | 83579 |
| 9 | 2873041 |
| 10 | 12193841 |
| 11 | 512343611 |
| 12 | 869783713 |
| 13 | 11779156811 |
| 14 | 769881545161 |
| 15 | 44110959165011 |
| 16 | 299540369626699 |
| 17 | 19450718635716001 |
| 18 | 16510282817165209 |
| 19 | 10784052561125704811 |
| 20 | 8321625562774808569 |
| 21 | 7342627959965776406281 |
[1,1,3,11,19,361,307,24611,83579,2873041,12193841, 512343611,869783713,11779156811,769881545161, 44110959165011,299540369626699,19450718635716001, 16510282817165209,10784052561125704811, 8321625562774808569,7342627959965776406281] |