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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 65 |
| 5 | 1578 |
| 6 | 0 |
| 7 | 0 |
| 8 | 1875535329 |
| 9 | 839252581538 |
| 10 | 0 |
| 11 | 0 |
| 12 | 5227844810759073967200 |
| 13 | 39228698077486633860579435 |
| 14 | 0 |
| 15 | 0 |
| 16 | 1102249786277252805957700361396650437576 |
| 17 | 135380785027014267422923708062639569342712090 |
| 18 | 0 |
| 19 | 0 |
[1,0,0,65,1578,0,0,1875535329,839252581538,0,0, 5227844810759073967200,39228698077486633860579435, 0,0,1102249786277252805957700361396650437576, 135380785027014267422923708062639569342712090,0,0] |