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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 104 |
| 4 | 118 |
| 5 | 4058 |
| 6 | 140816 |
| 7 | 4583282 |
| 8 | 143279864 |
| 9 | 863481484 |
| 10 | 4356837578 |
| 11 | 84349156318 |
| 12 | 129841645856 |
| 13 | 3803306126836 |
| 14 | 3810900219362 |
| 15 | 140836238080822 |
| 16 | 4756252744588444 |
| 17 | 152260682014044238 |
| 18 | 4707084862133100676 |
[2,4,104,118,4058,140816,4583282,143279864, 863481484,4356837578,84349156318,129841645856, 3803306126836,3810900219362,140836238080822, 4756252744588444,152260682014044238, 4707084862133100676] |