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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 159 |
| 3 | 6941 |
| 4 | 332285 |
| 5 | 15821727 |
| 6 | 754700909 |
| 7 | 35987024999 |
| 8 | 1716127952620 |
| 9 | 81836397835786 |
| 10 | 3902517029091331 |
| 11 | 186098468293931598 |
| 12 | 8874437930744029485 |
| 13 | 423193413557085915551 |
| 14 | 20180733461342796276880 |
| 15 | 962354302788447192584715 |
[4,159,6941,332285,15821727,754700909,35987024999, 1716127952620,81836397835786,3902517029091331, 186098468293931598,8874437930744029485, 423193413557085915551,20180733461342796276880, 962354302788447192584715] |