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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 116 |
| 3 | 2397 |
| 4 | 54845 |
| 5 | 1329644 |
| 6 | 33464881 |
| 7 | 864627351 |
| 8 | 22776683200 |
| 9 | 609024723535 |
| 10 | 16478750543705 |
| 11 | 450190397799036 |
| 12 | 12397538372467109 |
| 13 | 343712858468053319 |
| 14 | 9584085091610235280 |
| 15 | 268571959802603851989 |
| 16 | 7558772037473679862681 |
| 17 | 213548821612723752662596 |
[1,7,116,2397,54845,1329644,33464881,864627351, 22776683200,609024723535,16478750543705, 450190397799036,12397538372467109, 343712858468053319,9584085091610235280, 268571959802603851989,7558772037473679862681, 213548821612723752662596] |