| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 37 |
| 5 | 71 |
| 6 | 2213 |
| 7 | 9596 |
| 8 | 1200305 |
| 9 | 24684613 |
| 10 | 287152493 |
| 11 | 1355849266 |
| 12 | 427675990237 |
| 13 | 1032458258547 |
| 14 | 228796942438201 |
| 15 | 16841089312342856 |
| 16 | 665478473553144001 |
| 17 | 1653031004194447737 |
| 18 | 631449646252135295657 |
| 19 | 3167496749732497119310 |
[1,1,2,37,71,2213,9596,1200305,24684613,287152493, 1355849266,427675990237,1032458258547, 228796942438201,16841089312342856, 665478473553144001,1653031004194447737, 631449646252135295657,3167496749732497119310] |