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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 4 |
| 8 | 16 |
| 9 | 0 |
| 10 | 0 |
| 11 | 100 |
| 12 | 0 |
| 13 | 900 |
| 14 | 3136 |
| 15 | 0 |
| 16 | 0 |
| 17 | 99856 |
| 18 | 0 |
| 19 | 1201216 |
| 20 | 0 |
| 21 | 0 |
| 22 | 53523856 |
| 23 | 0 |
| 24 | 0 |
| 25 | 9104976400 |
| 26 | 122301280656 |
| 27 | 450364472464 |
| 28 | 0 |
| 29 | 0 |
| 30 | 6177879265156 |
| 31 | 22983279751744 |
| 32 | 0 |
| 33 | 0 |
| 34 | 63831513158616064 |
| 35 | 0 |
| 36 | 3449500721561320336 |
| 37 | 0 |
| 38 | 49676441991516395584 |
| 39 | 0 |
| 40 | 0 |
[0,1,0,0,4,16,0,0,100,0,900,3136,0,0,99856,0, 1201216,0,0,53523856,0,0,9104976400,122301280656, 450364472464,0,0,6177879265156,22983279751744,0,0, 63831513158616064,0,3449500721561320336,0, 49676441991516395584,0,0] |