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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 177 |
| 3 | 10199 |
| 4 | 1051745 |
| 5 | 169913511 |
| 6 | 39576670993 |
| 7 | 12555482177143 |
| 8 | 5204598491645121 |
| 9 | 2731249457298541895 |
| 10 | 1769824793166593577329 |
| 11 | 1387848700381793990412567 |
| 12 | 1295310886227493280950806817 |
[1,7,177,10199,1051745,169913511,39576670993, 12555482177143,5204598491645121, 2731249457298541895,1769824793166593577329, 1387848700381793990412567, 1295310886227493280950806817] |