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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 221 |
| 3 | 4265 |
| 4 | 47065 |
| 5 | 249197 |
| 6 | 256429 |
| 7 | 82680629 |
| 8 | 4143028753 |
| 9 | 2698130885 |
| 10 | 18995900417 |
| 11 | 195163601089 |
| 12 | 581539439365 |
| 13 | 1924737382669 |
| 14 | 6155051150201285 |
| 15 | 25057502411145377 |
| 16 | 378391033557627665 |
| 17 | 1057252484775138401 |
| 18 | 24775866907947863945 |
[5,221,4265,47065,249197,256429,82680629, 4143028753,2698130885,18995900417,195163601089, 581539439365,1924737382669,6155051150201285, 25057502411145377,378391033557627665, 1057252484775138401,24775866907947863945] |