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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 2586550 |
| 10 | 63629130 |
| 11 | 1389956550 |
| 12 | 28262449850 |
| 13 | 528075710190 |
| 14 | 9128165847570 |
| 15 | 146665445085747 |
| 16 | 2199981676286205 |
| 17 | 30929084994308490 |
| 18 | 408951234924745590 |
| 19 | 5101129401023536050 |
[1,0,0,0,0,0,0,0,0,2586550,63629130,1389956550, 28262449850,528075710190,9128165847570, 146665445085747,2199981676286205, 30929084994308490,408951234924745590, 5101129401023536050] |