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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 961 |
| 3 | 6759 |
| 4 | 46611 |
| 5 | 258952 |
| 6 | 1493661 |
| 7 | 9072707 |
| 8 | 53874293 |
| 9 | 315713411 |
| 10 | 1874906825 |
| 11 | 11126711003 |
| 12 | 65771372274 |
| 13 | 389369462027 |
| 14 | 2306918088206 |
| 15 | 13657520785513 |
| 16 | 80855461760683 |
| 17 | 478802042582831 |
| 18 | 2835088280044468 |
| 19 | 16786245481948186 |
[31,961,6759,46611,258952,1493661,9072707, 53874293,315713411,1874906825,11126711003, 65771372274,389369462027,2306918088206, 13657520785513,80855461760683,478802042582831, 2835088280044468,16786245481948186] |