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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 21 |
| 3 | 399 |
| 4 | 9135 |
| 5 | 233709 |
| 6 | 6400947 |
| 7 | 183585897 |
| 8 | 5443737390 |
| 9 | 165536020650 |
| 10 | 5133935821014 |
| 11 | 161768728483362 |
| 12 | 5164132704296202 |
| 13 | 166660621950110526 |
| 14 | 5428573285691233650 |
| 15 | 178234125351736454070 |
| 16 | 5892439158797172244515 |
[1,3,21,399,9135,233709,6400947,183585897, 5443737390,165536020650,5133935821014, 161768728483362,5164132704296202, 166660621950110526,5428573285691233650, 178234125351736454070,5892439158797172244515] |