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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 57 |
| 3 | 443 |
| 4 | 1407 |
| 5 | 1410 |
| 6 | 12242 |
| 7 | 15051 |
| 8 | 30952 |
| 9 | 44277 |
| 10 | 65190 |
| 11 | 68697 |
| 12 | 609531 |
| 13 | 921774 |
| 14 | 951092 |
| 15 | 2012670 |
| 16 | 2820460 |
| 17 | 11961680 |
| 18 | 32886944 |
| 19 | 3450005970 |
[6,57,443,1407,1410,12242,15051,30952,44277,65190, 68697,609531,921774,951092,2012670,2820460, 11961680,32886944,3450005970] |