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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 14791044 |
| 3 | 143014853 |
| 4 | 253149265 |
| 5 | 490434564 |
| 6 | 600606332 |
| 7 | 993861182 |
| 8 | 3279563483 |
[4,14791044,143014853,253149265,490434564, 600606332,993861182,3279563483] |