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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 16 |
| 3 | 46 |
| 4 | 16 |
| 5 | 596 |
| 6 | 936 |
| 7 | 5326 |
| 8 | 64452 |
| 9 | 35472 |
| 10 | 2267096 |
| 11 | 6154424 |
| 12 | 36768700 |
| 13 | 493844572 |
| 14 | 304850530 |
| 15 | 19837028156 |
| 16 | 60734482172 |
| 17 | 379565828184 |
| 18 | 5278506424584 |
| 19 | 3491085331400 |
| 20 | 230590641604648 |
| 21 | 737735394947292 |
| 22 | 4754537676837632 |
[9,16,46,16,596,936,5326,64452,35472,2267096, 6154424,36768700,493844572,304850530,19837028156, 60734482172,379565828184,5278506424584, 3491085331400,230590641604648,737735394947292, 4754537676837632] |