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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 31 |
| 2 | 605 |
| 3 | 9515 |
| 4 | 131901 |
| 5 | 1684011 |
| 6 | 20303725 |
| 7 | 234831355 |
| 8 | 2632942301 |
| 9 | 28828462091 |
| 10 | 309891463245 |
| 11 | 3283433875995 |
| 12 | 34394321024701 |
| 13 | 357022927273771 |
| 14 | 3679144385477165 |
| 15 | 37693176577349435 |
| 16 | 384361331408659101 |
[1,31,605,9515,131901,1684011,20303725,234831355, 2632942301,28828462091,309891463245,3283433875995, 34394321024701,357022927273771,3679144385477165, 37693176577349435,384361331408659101] |